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.