The Tonight Show Starring Jimmy Fallon airs weeknights at 11:35/10:35c on NBC. Scroll up to watch Black’s unforgettable entrance in the video above.

Jack Black handled a wardrobe malfunction like a pro while making an appearance on The Tonight Show Starring Jimmy Fallon! However, Black's entrance ended with his pants falling off his waist as ...

Jack Black experienced a slight wardrobe malfunction during his Monday appearance on “The Tonight Show Starring Jimmy Fallon.” The actor, 55, came out while playing on an electric guitar ...

Jimmy Fallon gave a lengthy breakdown about the band before they hit the 'Tonight Show' stage after Marcus Mumford called him out for his brief intro at the 'SNL 50' concert.

Writer/director Ryan Coogler and actor Michael B. Jordan appeared on "The Tonight Show starring Jimmy Fallon" to discuss ...

Jack Black made a hilarious entrance on The Tonight Show Starring Jimmy Fallon, accidentally revealing his red and black boxers. The 55-year-old actor, who is gearing up for his upcoming project ...

A skit from The Tonight Show Starring Jimmy Fallon attempted to make Purdue's "Boilermakers" nickname the butt of the joke. But after a few rounds on social media, plenty of fans wearing gold and ...

(From left) Marcus Mumford and Jimmy Fallon on 'The Tonight Show Starring Jimmy Fallon' on Tuesday. - Todd Owyoung/NBC/Getty Images ...

Jack Black suffered a hilarious wardrobe malfunction as he made a grand entrance on Monday night’s episode of “The Tonight Show.” As he was announced by Jimmy Fallon, the actor, 55 ...

Jimmy Fallon certainly got back on Mumford & Sons' good side. On the Wednesday, March 26 episode of The Tonight Show Starring Jimmy Fallon, the comedian/host, 50, made up for his brief ...