WASHINGTON (AP) ― Will Ferrell, who refined his impersonation of President George W. Bush on the sketch comedy show “Saturday Night Live” and later took his presidential act to Broadway, was awarded the nation’s top humor prize Sunday night.

The TV star went on to make movies and co-found the popular website FunnyorDie.com in a career that won the 44-year-old the Mark Twain Prize for American Humor from the Kennedy Center for the Performing Arts.

It was the Bush impression, though, that might have made the Washington crowd laugh ― and cringe ― the hardest Sunday.

“Washington is not a city much known for its comedy ― at least not the intentional kind,” said PBS news anchor Gwen Ifill, who mentored Ferrell on his journalistic skills for the movie “Anchorman.”

She introduced a clip of Ferrell playing Bush in “You’re Welcome, America: A Final Night with George W. Bush” on Broadway. Dressed in a flight suit under a banner that read “Mission Accomplished” in a mock Oval Office he explained how Morocco had sent a special unit of 2,000 trained monkeys to fight terrorism “and make children laugh.”

With that kind of comedy, Ferrell had accomplished something amazing, Ifill said.

“He got Democrats to pay and see and applaud George W. Bush,” she said.

Conan O’Brien, Jack Black, Matthew Broderick, Ben Stiller and Billie Joe Armstrong from the rock band Green Day performed Sunday in Ferrell’s honor, joined by Molly Shannon, Tim Meadows and Andy Samberg from Ferrell’s “SNL” days.

The show was taped for broadcast Oct. 31 on PBS stations nationwide.

Black opened the show with a song-and-dance routine for his friend and tried to lead the crowd in chanting “Will, Will, Will, will rock you.”

“Will Ferrell, did you notice how I changed it from `We Will Rock You?” he said.

“It’s about time he got some official Washington, D.C., props,” Black said, noting that Ferrell had “reigned supreme” on “SNL” for seven years. “He’s crazy funny. He makes you laugh so hard you cry and pee simultaneously.”

O’Brien saluted Ferrell for giving so much of himself to his comedy. He said Ferrell had his sides physically softened and his “buttocks lowered with magnets” to prepare his body for spandex routines and at times streaking naked.

“Will magnifies and celebrates his flaws, just to entertain us,” O’Brien said.

O’Brien also thanked Ferrell for being his first guest and his last guest when he was host of NBC’s “Tonight Show.”

“It’s a rare friend who’s going to stick with you for five-and-a-half months,” he said.

Shannon, who met Ferrell while she was a waitress in Los Angeles, said that contrary to his TV persona, Ferrell is very serious and sweet to work with. As for the award, she joked “Will’s agents and manager clearly bought this for him.”