NEW YORK, NY - APRIL 07: Presenter David Letterman speaks onstage at the 32nd Annual Rock & Roll Hall Of Fame Induction Ceremony at Barclays Center on April 7, 2017 in New York City. Debuting on HBO Saturday, April 29, 2017 at 8:00 pm ET/PT (Photo by Mike Coppola/Getty Images)

In honor of David Letterman’s birthday, we’re bringing you the best beards in Hollywood!