There's "Grizzly Adams" star Dan Haggerty, ZZ Top and more. Take a look at some of our favorite celebrity beards, past and present.
Actor Tom Payne attends "The Walking Dead" panel at Comic Con at The Theater at Madison Square Garden on Oct. 7, 2017, in New York City.
Actor Chris Sullivan at the world premiere of Marvel Studios' "Thor: Ragnarok" at the El Capitan Theatre on Oct. 10, 2017, in Hollywood, California.
Actor Joaquin Phoenix attends the Headline Gala Screening and U.K. premiere of "You Were Never Really Here" during the 61st BFI London Film Festival on Oct. 14, 2017, in London.
Ted Dwane of Mumford & Sons performs at the BB&T Pavilion on May 25, 2017, in Camden, N.J.
TV personality Scott Disick visits the Sugar Factory American Brassiere on Oct. 13, 2017, in Bellevue, Wash.
Jake Gyllenhaal participates in Broadway's "Sunday in the Park with George" media day and Hudson Theatre grand re-opening ceremony on Wednesday, Feb. 8, 2017, in New York.
Jeff Bridges attends the Global Green USA 14th Annual Pre-Oscar Party at TAO Hollywood on Feb.22, 2017, in Los Angeles.
Sam Hunt performs at the 2017 CMA Music Festival on June 9, 2017 in Nashville, Tenn.
Singer Miguel attends the Victoria's Secret Fashion Show In Shanghai After Party on Nov. 20, 2017, in Shanghai, China.
Actor Chris Hemsworth attends SiriusXM's "EW Spotlight" with Chris Hemsworth and Taika Waititi at SiriusXM Studios on Oct. 30, 2017, in New York City.
Dave Grohl of the Foo Fighters performs at the Corona Capital music festival in Mexico City, on Saturday, Nov. 18, 2017.
Phil Robertson of "Duck Dynasty" speaks at a rally for U.S. Senate hopeful Roy Moore on Sept. 25, 2017, in Fairhope, Ala.
NBA player James Harden at the Maxim Super Bowl Party on Feb. 5, 2017, in Houston, Texas.
Dusty Hill, left, and Billy Gibbons of ZZ Top perform at Blue Hills Bank Pavilion on Aug. 28, 2016, in Boston.
Country singer Chris Stapleton at the 51st Academy of Country Music Awards in April 2016.
Retired late night talk-show host David Letterman is nearly unrecognizable in this in March 2016 photo, spotted with a scruffy beard during a morning workout on the Caribbean island of St. Barts.
Comedian Jon Stewart helps kick off the fifth anniversary of Joining Forces and the 75th anniversary of the USO on May 5, 2016.
Jason DeRulo arrives at the Clive Davis Pre-Grammy Gala at the Beverly Hilton Hotel on Feb. 7, 2015, in Beverly Hills, Calif.
Actor Jim Carrey at the Los Angeles County Museum of Art 50th anniversary gala in Los Angeles on April 18, 2015.
George Clooney arrives at the Oscars at the Dolby Theatre on Feb. 24, 2013, in Los Angeles.
Actor Shia LaBeouf arrives at the premiere of "Lawless" on Aug. 22, 2012, in Hollywood, California.
Actor Dan Haggerty, who starred in the film and TV series "The Life and Times of Grizzly Adams" about a mountain man and animal trainer, at the premiere of the musical feature film "Standing Ovation" in Universal City, Calif., on July 10, 2010.
Actor Daniel Day-Lewis attends the premiere of "The Ballad of Jack & Rose" at Chelsea West Theater on March 23, 2005, in New York City.
Justin Timberlake at the 50th Anniversary of Rock 'N' Roll Reunion Celebration on July 5, 2004, at Sun Studio in Memphis, Tenn.
Actor Sean Connery at the 35th AFI Life Achievement Award tribute to Al Pacino at the Kodak Theatre on June 7, 2007, in Hollywood, Calif.
Actor Mr. T, in one of his best-known roles, as Sylvester Stallone's antagonist in 1982's "Rocky III."