There's "Grizzly Adams" star Dan Haggerty, the "Duck Dynasty" guys and ZZ Top -- and who can forget Brad Pitt's scraggly growth circa 2009? Take a look at some of our favorite celebrity beards, past and present.
Brian Wilson(Credit: Getty Jeff Gross)
Brian Wilson at Dodger Stadium on October 14, 2013 in Los Angeles, California.
Jim Carrey(Credit: Getty Images / Charley Gallay / Stringer)
Actor Jim Carrey poses for a photo during the arrival for the Los Angeles County Museum of Art (LACMA) 50th anniversary gala in Los Angeles on April 18, 2015.
Chris Stapleton(Credit: Getty Images / David Becker)
Country singer Chris Stapleton poses at the 51st Academy of Country Music Awards in April 2016.
David Letterman(Credit: AKM IMAGES-GSI MEDIA)
Retired late night talk-show host David Letterman in March 2016.
Jon Stewart(Credit: AP)
Comedian Jon Stewart speaks as he helps kick off the fifth anniversary of Joining Forces and the 75th anniversary of the USO on Thursday, May 5, 2016.
Brad Pitt(Credit: AP )
Actor Brad Pitt's beard in 2009.
ZZ Top(Credit: AP)
Rock stars ZZ Top's beards in Jan. 18, 2001.
Phil Robertson(Credit: A&E Network)
Phil Robertson of the hit A&E reality show "Duck Dynasty."
George Clooney(Credit: AP)
Actor George Clooney's beard in February 2013.
Actor Jake Gyllenhaal's beard in November 2012.
Daniel Day-Lewis(Credit: AP )
Daniel Day-Lewis in his Oscar-winning role as Abraham Lincoln in the 2012 biopic "Lincoln."
Mr. T(Credit: AP)
Actor Mr. T, in one of his best-known roles, as Sylvester Stallone's antagonist in 1982's "Rocky III."
Jeff Bridges(Credit: AP)
Actor Jeff Bridges, circa his 2010 film, "True Grit."
Ted Dwane(Credit: AP)
Mumford & Sons bassist Ted Dwane in June 2013.
Shia LaBeouf(Credit: AP)
Actor Shia LaBeouf in April 2013.
Dave Grohl(Credit: AP)
Lead singer of the Foo Fighters Dave Grohl's beard in April 2013.
Dan Haggerty(Credit: AP)
Star of the late '70s TV series, "The Life and Times of Grizzly Adams," Dan Haggerty's beard in September 1979.
James Harden(Credit: AP)
Houston Rockets shooting guard James Harden in February 2013.
Scott Ian(Credit: AP)
Guitarist for thrash metal band Anthrax, Scott Ian's beard in February 2013.
Sean Connery(Credit: AP)
Actor Sean Connery's beard in June 2007.
Kris Kristofferson(Credit: AP)
Singer-songwriter Kris Kristofferson's beard in June 2010.
R.A. Dickey(Credit: AP)
Toronto Blue Jays pitcher R.A. Dickey's beard in April 2013.