Bradley Cooper is seen out on a jog, Sept. 11, 2016, in Los Angeles.

Harrison Ford attends the AFI Life Achievement Awards: A Tribute to John Williams at the Dolby Theatre on June 9, 2016 in Hollywood, Calif.

David Letterman is nearly unrecognizable with his snowy beard as he gets in a morning workout in Saint Barthelemy, France, March 22, 2016.

Will Forte attends the 2016 Winter TCA Tour FOX All Star Party in Pasadena, Calif., Jan. 15, 2016.

Actor Angus T Jones is seen, Jan. 4, 2016, in Venice, Calif.

Jamie Dornan is seen in London, June 29, 2015, wearing his new handle bar mustache.

Actor Kiefer Sutherland leaves his Tribeca hotel on June 8, 2015 in New York.

Jim Carrey is seen in New York, May 18, 2015.

Sting attends the 60th Annual OBIE Awards at Webster Hall, May 18, 2015, in New York.

Matthew Morrison attends the 2015 Drama Desk Awards Nominee Reception at New World Stages, May 6, 2015, in New York.

Tom Hardy attends the UK Premiere of "Child 44" at Vue West End, April 16, 2015, in London.

Brad Pitt leaves the set of new movie "The Big Short" in Los Angeles, April 8, 2015.

Jon Hamm seen at LAX, March 24, 2015, in Los Angeles.

Kurt Russell is seen in Aspen, Colo. on Dec. 29, 2014.

Leonardo DiCaprio sports a flat cap and a beard as he attends the pre-opening of the Art Basel exhibition in Miami, Dec. 12, 2014.

Actor Andrew Garfield is seen is Soho on Nov. 19, 2014 in New York City.

Actor Gerard Butler is seen, June 5, 2014, in Los Angeles.

Ryan Reynolds is seen arriving in Nice for the 67th Annual Cannes Film Festival, May 15, 2014, in Nice, France.

Ray Liotta steps out, April 28, 2014 in Brentwood, Calif.

Joe Jonas attends the NYLON + McDonald's Dec/Jan issue launch party in West Hollywood, Calif., Dec. 5, 2013.

Jon Hamm sports a beard as he runs some errands in Los Angeles, Sept. 19, 2013.

Actor Chris Pine gets ready to shoot a scene for his new movie "Stretch", July 15, 2013 in Hollywood. Pine and his huge beard stepped out of his trailer while filming on location, the movie will tell the story of a chauffeur that takes a job for a billionaire who makes his life hell, also starring Brooklyn Decker, Ed Helms and Ray Liotta.

Kurt Russell looking a bit like Grizzly Adams with a bushy beard and graying hair as he rides his bike after lunch at Back On The Beach Cafe in Santa Monica, July 13 2013.

Actor John Travolta showed off his tiny goatee during the Breitling Boutique Orlando Grand Opening Event on March 28, 2013 in New York City.

Liam Hemsworth arrives from a flight at LAX airport in Los Angeles, Calif., March 20, 2013, sporting a scruffy look that he debuted earlier in the week while in the Philippines promoting the clothing line Bench. This is his first time back in Los Angeles since reports surfaced that he and fiancee Miley Cyrus were having problems. In pictures posted on Twitter Tuesday, Cyrus had her ring back on.

Oscar winner Ben Affleck stepped out in Long Beach, Feb. 28, 2013 and showed off his newly shaved face. The "Argo" director reportedly shaved his beard at an Oscar after party.

Bill Murray is getting serious about his facial hair. The 62-year-old actor showed off his gray mustache at the Pebble Beach Golf Links where he participated in the celebrity challenge event of the AT&T Pebble Beach Pro-Am golf tournament Feb. 6, 2013.

What happened to Jared Leto? Besides dropping a few pounds, the actor shaved his brows to play a drag queen in 'Dallas Buyer's Club.' He showed off his hairless facade at the Gotham Independent Film Awards.

Could Will Ferrell be growing a mustache for No Shave November/Movember? Nov. 1 marks the start of the annual movement in which men let their facial hair flourish to raise awareness for prostate cancer. Ferrell could be leading the charge, but it's also worth noting that he's filming the "Anchorman" sequel now and needs a Ron Burgundy 'stache for that.

John Travolta shows off an unusual goatee while attending a Barbra Streisand concert with wife Kelly Preston Oct. 13, 2012 in New York City.

Russell Crowe looks a bit wild and wooly while watching his soccer team, the South Sydney Rabbitohs, warm up in their match against the Canterbury Bulldogs Sept. 22, 2012 in Sydney, Australia.

Kelsey Grammer and new daughter Faith Evangeline Elisa Grammer are seen after having dinner in Los Angeles on August 31, 2012. Grammer has ditched his beard in favor of a new pencil mustache. The "Boss" star's new look was on display as he left the BOA Steakhouse with Faith and his wife, Kayte Walsh.

Don Draper is clean shaven on "Mad Men," but Jon Hamm likes to grow a fuzzy beard every now and then. Here is is at the 2012 Can-Do Awards at Cipriani Wall Street on April 17, 2012 in New York City.

Matt Damon showed off a whispy mustache in New York City Feb. 26, 2010.

Antonio Banderas was barely recognizable with his thick salt-and-pepper beard he revealed Feb. 23, 2010, in Los Angeles.

Conan O'Brien grew some facial hair after "The Tonight Show With Conan O'Brien" was canceled. The comedian took his two children, Neve and Beckett, took a time out in Hawaii on vacation.

Brad Pitt wore his Halloween beard beads during a promotion for "Inglourious Basterds" in Tokyo. Pitt was dressed as DJ Lance Rock from the show "To Gabba Gabba" while trick-or-treating with his family.

Ben Affleck channeled his inner grunge look for his role in the movie "Extract." The normally well-groomed Affleck grew a full beard, complete with a moustache and free-flowing hairstyle.