Famke Janssen walks her dog Licorice in the West Village in New York City, Nov. 27, 2016.

Kaley Cuoco posted a photo to Instagram with her dog Ruby, Oct. 17, 2016.

Hilary Duff with a Yorkie in her arms in West Hollywood, California, Oct. 9, 2016.

Jenna Dewan Tatum and a friend take her dogs for a hike in Studio City, California on Oct. 4, 2016.

Kelly Osbourne attends the John Paul Ataker fashion show during New York Fashion Week: The Shows at The Dock, Skylight at Moynihan Station on Sept. 13, 2016 in New York.

Drew Barrymore posted a photo on her Instagram account, Sept. 12, 2016.

Kaley Cuoco shared this image to her Instagram account, Aug. 30, 2016.

Ellen Page takes her dog 'Patter' for a walk on a day off from filming 'Flatliners' in Toronto, Canada, Aug. 22, 2016.

Zachary Quinto (L) and Miles McMillan walk their dogs in the East Village in New York, Aug. 2, 2016.

Kaley Cuoco is seen in a photo posted to her Instagram account on July 26, 2016.

Chelsea Handler is seen snuggling close to her dog in this photo she shared to her Instagram account, July 6, 2016.

Kaley Cuoco posted this photo to her Instagram account on June 16, 2016 with the caption, "Steady Netty performs perfectly yet again."

Carrie Fisher and her dog Gary are pictured outside the Chinese embassy in London during a Humane Society protest against an dog meat festival in China, June 7, 2016.

Reese Witherspoon goes for a family hike with her sons Deacon and Tennessee and their dogs in Los Angeles, May 28, 2016.

Mayim Bialik posted this picture of herself on her Instagram account, April 21, 2016.

This photo was posted to Anderson Cooper's Instagram account with the caption, "My dog Molly passed away a few months ago. This weekend Lilly showed up! She's a Welsh Springer Spaniel."

Nine-year-old, multi-award-winning actor Jacob Tremblay walks the WE Carpet at WE Day California 2016 at The Forum, April 7, 2016, in Inglewood, Calif.

Kaley Cuoco posted this photo to her Instagram account on April 5, 2016 with the caption, "Welcome to the family, gorgeous miss Bella. I'm already in love with you!"

Jennifer Lawrence is seen here with her dog Pippi, March 20, 2016, in New York.

This photo was posted to Olivia Munn's Instagram account with the caption "One of the best decisions we ever made was adopting this pup," March 15, 2016.

A pregnant Chrissy Tiegen gets some retail therapy with her pooch Pippa on March 14, 2016 in Beverly Hills, Calif.

Hugh Jackman walks his dogs in the West Village on March 12, 2016 in New York City.

Bindi Irwin posted this image with the caption,"Meet Stella. The newest edition to our little family. At 10 weeks old, she's already melting hearts," March 6, 2016.

Chelsea Handler posted a photo of her dog on her Instagram account, March 4, 2016.

This photo was posted to Gisele Bundchen's Instagram account on Feb. 25, 2016 with the text, "The kids are over the moon with our new family member. Fluffy is pure joy!"

Jennifer Lawrence arrives at her hotel with dog Pippi on Feb. 17, 2016 in New York.

Demi Lovato posed with her new dog in a photo posted to her Instagram account on Feb. 9, 2016.

Dwayne "The Rock" Johnson took his cute French bulldog to work out in an image he shared to his Instagram account, Feb. 1, 2016.

Jessica Chastain is seen walking her three-legged dog Chaplain on rainy afternoon, Dec. 22, 2015 in New York.

This photo was posted to The Rock's Instagram account on Dec. 21, 2015 with the text, "You gotta problem punk?"

Carrie Fisher and her dog Gary attend the European Premiere of "Star Wars: The Force Awakens" After Party at Tate Britain, Dec. 16, 2015 in London.

Ariana Grande is seen leaving Gifts Et Al with her dog in Los Angeles, Dec. 9, 2015.

Kate Upton starts her morning off with a workout, taking her dog out for a hike in Beverly Hills, Calif., on Nov. 16, 2015.

Selma Blair is seen with her dog Ducky in Beverly Hills on Nov. 11, 2015 in Los Angeles.

Kylie Jenner steps out with her dog, Norman, in Los Angeles, Nov.11, 2015.

George and Amal Clooney adopted Millie a basset hound, Oct. 28, 2015, in San Gabriel, Calif.

Kate Upton and Justin Verlander are seen at LAX, Oct. 27, 2015 in Los Angeles.

Madonna posted this image to Instagram on Oct. 11, 2015 with the caption, "Getting that beauty Rest for the big show tonight in Edmonton!"

Miranda Kerr at the park with her puppy and son shows off her toned tummy in a cropped top, Sept. 30, 2015.

Hugh Jackman works out in the Hudson River Park with Nigel Barker and 'The Dogpound' by Kirk Meyers Fitness in New York City on Sept. 12, 2015.

Karlie Kloss is spotted wearing coral colored dress while walking her Yorkshire Terrier, Joe in New York City.

The Rock posted this photo to Instagram on Sept. 9, 2015 with the caption, "First I save this lil' zombie Brutus' life from drowning in the pool, now he decides to get all sick on me and having that awesome "north/south" action coming out of both ends of his body. Fun night. Thank you to the animal Dr's and nurses at St. Francis Emergency Animal Hospital for taking care of our gremlin. He'll be back in no time wrestling and biting the shit outta my hands and happily peeing on my Jordan's."

Liam Hemsworth is spotted out walking his dog and watching a friend skateboard at Griffith Park in Los Angeles, Calif., Sept. 1, 2015.

Kaley Cuoco posted this photo to Instagram on Aug. 30, 2015 with the caption, "Love this guy!"

Actress Amanda Seyfried is seen in New York City, Aug. 27, 2015.

Demi Lovato posted this photo to Instagram on Aug. 22, 2015 with the caption, "BATMAAAAANNNNNN!!!!!"

Miley Cyrus posted this photo on Aug. 24, 2015 with the caption, "Lol! Morningzzzz w LiLo!"

Rose McGowan is seen on Aug. 20, 2015 in Los Angeles.

Demi Lovato posted this photo to Instagram on Aug. 20, 2015 with the caption, "Ummm... guys.... meet Batman....."

Jane Fonda holds her pet pooch while waiting outside of Craig's Restaurant in West Hollywood, Calif., Aug. 19, 2015.

Channing Tatum shared this image of his new horse friend to his Instagram account, Aug. 18, 2015.

This image was posted to Kerry Washington's Instagram account on Aug. 8, 2015 with the text, "From the chair. At the shoot. She's so fancy!!!!"

Ciara is seen with friends on Aug. 10, 2015 in New York.

Norman Cook posted this photo to Instagram on Aug. 6, 2015 with the caption," She's not the cuddliest of dogs, but sometimes she lets me nuzzle her and it makes me so so happy."

Amanda Seyfried and her dog Finn visit the New York City Human Resources Administration in the Bronx, July 29, 2015.

John Slattery is seen walking his dog in SoHo on July 28, 2015 in New York City.

Gerard Butler was spotted while out for a stroll with his dog, July 23, 2015, in West Hollywood, Calif.

Kaley Cuoco posted this image on Instagram on July 21, 2015, with the original caption, "#photobombyourhorse."

'Argo' star Ben Affleck is spotted wearing his wedding ring while arriving in Atlanta, July 20, 2015, with a brand new puppy. Ben is in town to spend time with his estranged wife Jennifer Garner while she films her new movie 'Miracles From Heaven.'

Chelsea Handler uploaded this photo to Instagram on July 18, 2015 with the caption, "This is my new baby rat/bear. Chunk has a sister. Front runner name is Carmen. I'd like some other suggestions from all the people who love chunk. Something with a Spanish flair."

Kaley Cuoco is seen with her show horse in a photo she posted to Instagram.

Toast, the Cavalier King Charles spaniel, hangs out with her tongue out at Park Hyatt New York. The Instagram star was there on June 29, 2015 to support Friends of Finn, a committee dedicated to eradicating the industry of puppy mills in the U.S. She and other celebrity dogs celebrated with a luxurious "Fashionable Pup Playdate." 

Heiress Amanda Hearst and her dog Finn have a play date with other famous pooches at Park Hyatt New York, which offers free dog walking plus room amenities like a dog bed, treats, collar and charm with hotel info. Hearst founded the Humane Society of the United States committee "Friends of Finn," which will receive a $100 donation when guests check in their dog to the Park Hyatt New York.

Casper Smart and Jennifer Lopez walk their dogs in Madison Square Park in New York, June 30, 2015.

Cindy Crawford posted this photo with the caption: "Today's set? My closet! Hanging out with @kaiagerber (and Widget and Sugar!) for the @thethick_. Possible conversation, coming soon!" June 23, 2015.

Miley Cyrus uploaded this photo to Instagram on June 18, 2015.

Michael C. Hall is seen walking his dog in New York City, June 17, 2015.

Actor Hugh Jackman is seen walking his dogs Dali and Allegra in Soho on June 11, 2015 in New York.

Peter Dinklage takes his dog, Kevin, for a walk in the Meatpacking District of New York, May 27, 2015.

Gisele Bundchen posted this photo to Instagram on May 24, 2015 with the caption, "Our newest family member Scooby..."

Amanda Seyfried walks with her dog, Finn, near Washington Square Park in New York, May 19, 2015.

David Beckham shared this image of his pooch, Coco, to his Instagram account, May 7, 2015.

Olivia Munn is seen with her dog Chance, May 3, 2015, in New York.

"Superman" actor Henry Cavill walks his dog Kal-El in London, April 14, 2015.

Dakota Johnson is seen walking her dog Zeppelin in the Soho neighborhood of New York on April 19, 2015.

Demi Lovato posted this photo to Instagram on April 13, 2015 with the caption, "With my little angel..."

Anne Hathaway and Adam Shulman take a walk with their dogs in New York, April 12, 2015.

Dakota Johnson is seen walking her dog in the West Village neighborhood of New York, April 8, 2015.

Brooke Shields takes her dog out for a walk in the SoHo neighborhood of Manhattan, April 6, 2015, in New York City.

Gwyneth Paltrow posted this photo to Instagram, April 5, 2015, with the caption: "New additions to the family! #thesmilesaysitall #happyeaster."

Olivia Wilde is seen walking her dog Paco as she took him around her Brooklyn, New York neighborhood on April 2, 2015.

Allison Williams posted this photo to Instagram, March 23, 2015, with the caption, "In honor of #NationalPuppyDay, meet the new member of my family, Moxie. We adopted her from @animalleague, so since she's a rescue we're not exactly sure age/breed. They think 10 weeks and Golden mix. My heart bursts for this lady. Even when she wakes me up at night. #ObviNoFilter #SoTired #SoWorthIt"

Amanda Seyfried is seen on March 19, 2015 in New York City.

Heidi Klum is pictured with her dogs in an image posted to her Instagram account on March 10, 2015 with the text, "Good morning."

Kaley Cuoco posted this photo to Instagram, March 10, 2015, with the caption, "I'm not the only one obsessed with my #swell bottle :) Ruby is too!!"

Chrissy Teigen posted this photo of herself to Instagram, March 2, 2015, with the caption: "my boy."

This photo of Lua, the dog owned by Gisele Bundchen and Tom Brady, was posted to Bundchen's Instagram account on Feb. 28, 2015 with the text, "Sweet Lua ... Doce Lua."

Actress Kaley Cuoco poses with a dog in a photo posted to her Instagram account on Feb. 23, 2015 with the text, "Goodnight world."

Kerry Washington posted this photo to Instagram on Feb. 17, 2015 with the caption, "Things have gotten out of control. This diva just kicked me outta the chair for a blow out."

Katherine Heigl is pictured carrying her dog after having lunch with her mom at Franklin and Company Cafe in Los Angeles on Jan. 27, 2015.

Chrissy Teigen posted this photo to Instagram,Jan. 21, 2015, with the caption, "Where..did I put my leg"

This photo was posted to Hugh Jackman's Instagram account with the text, "Doing his morning yoga. #DaliJackman" on Jan. 20, 2015.

This image was posted to Demi Lovato's Instagram account with the caption, "Buddy's first trick!!! #stand" on Jan. 12, 2014.

Jennie Garth picks up her dogs at Sam's Green Paw Day Care in Studio City, Calif, Jan. 12, 2015.

Gisele Bundchen shared this image of pet pooch to her Instagram captioned: "Lua already has her game face on. Let's go pats!!!!"

Hugh Jackman posted this photo to Instagram, Jan. 8, 2014, with the caption, "??Nothin' but love. #blessed."

Demi Lovato posted this photo of her dog to Instagram, Dec. 30, 2014, with the caption: "Well good morning sleepyhead...."

Hugh Jackman posted this photo of himself with his new pet dog to Instagram, Dec. 23, 2014, with the caption: "Santa came early and he brought a sister for Dali. No name just yet."

Kaley Cuoco posted this photo to Instagram on Dec. 22, 2014 with the caption, "Getting a manicure w the Rubes. She's a girls girl"

Demi Lovato posted this photo to Instagram on Dec. 16, 2014 with the caption, "Guys....... SANTA CAME EARLY THIS YEAR......!!!!!!!!!!!!!!!!!!!!!!!"

Hugh Jackman posted this photo to Instagram on Dec. 8, 2014 with the caption, "Driven in my car. I turn on the radio...."

Kaley Cuoco posted this photo to Instagram on Dec. 1, 2014 with the caption, "Obsessed with this dog. #norman #muttmonday"

John Legend and Chrissy Teigen with their dog are seen during a photo shoot in East Village, Dec. 1, 2014, in New York.

Hugh Jackman posted this photo to Instagram on Nov. 27, 2014 with the caption, "ALL BE HAPPY @livelaughingman"

Elsa Pataky posted this photo to Instagram, Nov. 24, 2014, with the caption: "Who could've said no! Our new family member."

Arnold Schwarzenegger is seen in a photo posted to his Instagram account on Nov. 14, 2014 with the text, "If anyone notices I have lost a little weight, blame Whiskey. She's been stealing my breakfast every morning."

Chrissy Teigen posted this photo on Instagram with this caption: "Hi monkey," Nov. 12, 2014.

Miley Cyrus posted this image to Instagram on Nov. 7, 2014 with the caption, "best friends."

Actress Kaley Cuoco is seen in an image posted to her Instagram account on Nov. 4, 2014 with the text, "She's a girlie girl- loves playing in the closet with me. I want to eat her #ruby."

Ian Somerhalder posted this photo of himself, Nikki Reed and their new cat to Instagram, Nov. 2, 2014.

Hugh Jackman posted this photo on Oct. 27, 2014 to Instagram with the caption: 'Good morning! #Dali."

Amy Adams was spotted with her dogs going for a hike at Tree People in Los Angeles, Oct. 26, 2014.

Bethenny Frankel posted this photo to Instagram on Oct. 22, 2014 with the caption "Resting up on this rainy hump day with @cookiedabooboo - gotta be ready for out final #CookieMeetsPeanut book redding & signing tomorrow at @barnesandnobel TriBeCa! Hey #NYC- who's coming? 4pm!!"

Lauren Conrad posted this photo on Oct. 20, 2014 to Instagram with the caption: "Well this is awkward... Chloe's lion costume came in the mail today. Trying to figure out how to tell her "Ringleader and Lion" didn't win in the laurenconrad.com costume poll."

Kaley Cuoco posted this photo on Oct. 19, 2014 to Instagram with the caption: "Quick shut eye with Ruby."

Lady Gaga posted this photo of herself with her little dog Fozzi to Instagram on Oct. 18, 2014 with the caption, "It's a bird... It's a plane... it's a hat. It's fozzi bear!"

Paris Hilton is seen with her dog in New York City on Oct. 16, 2014 in New York City.

Paris Hilton is seen with her dog, Prince Hilton, after shopping in Beverly Hills, Calif., Oct. 14, 2014

Reese Witherspoon attends a photo call for "Wild" during the 58th BFI London Film Festival at May Fair Hotel, Oct. 13, 2014, in London. | Reese Witherspoon posted this photo to Instagram, Oct. 11, 2014, with the caption, "Do you know that a dog looking you in the eye releases love chemicals in your brain??? #lovemylab #hearditon60minutes."

Kaley Cuoco posted this photo on her dog's Instagram on Oct. 10, 2014 with the caption, "Christmas came early this year!! You know you want your own custom doggie Santa hats!!! Contact the brilliant @paperglittertwine and get your own! #shirleyclause #normantheelf."

Ian Somerhalder posted this image to his Instagram on Oct. 8, 2014 with the caption, "A day with 3 of the most beautiful ladies in the universe..."

Hugh Jackman shared this image of his pet pooch to Instagram captioned; "Monday morning meeting with our Chief of Staff. #DaliJ," Oct. 6, 2014.

Hannah Simone and her dog, Maggie attend the Video Premiere Party to benefit Best Friends Animal Society held at Palihouse Holloway on Oct. 2, 2014 in West Hollywood, Calif.

Kesha seen at LAX, Sept. 23, 2014, in Los Angeles.

Bethenny Frankel and her dog Cookie are seen during a "Good Morning America" taping at the ABC Times Square Studios, Sept. 23, 2014, in New York.