Moments from David Letterman's Final 'Late Show'

After 33 years in late night and nearly 20,000 guests, David Letterman signed off the Late Show on May 20, 2015.

Check out the pics from Letterman's final Late Show!

Letterman addressed the crowd during his final Late Show on May 20.

Bill Murray headed up an all-star cast of presenters for Letterman's final Top Ten list, "Top Ten Things I've Always Wanted to Say to Dave."

Jim Carrey accused Dave of "overacting" in his Top Ten bit, then did this.

Letterman shared one final handshake with his longtime bandleader Paul Shaffer.

The Foo Fighters rocked the Ed Sullivan Theater for Letterman's final Late Show.

Letterman said a final goodbye to his studio audience before signing off on May 20.