The Tonight Show Starring Jimmy Fallon

Their story involves Fred Armisen, a Paul Weller concert, and a friendship that dates back to Fallon's Saturday Night Live days.

The British heartthrob had quoted Samuel L. Jackson from the original Jurassic Park in a foreshadowing Instagram post.

Mariah Carey, Tina Fey, Joan Rivers, and more stars ponied up during Fallon's 2014 Tonight Show premiere.

The rapper told Jimmy Fallon he's excited to say "Hay!" to Mopsie, a.k.a. "Rave Horse."

Snoop Dogg's so ready to join his friends Gwen Stefani and the gang as a Season 26 Coach.

"She comes across with a paper plate full of whip cream and slaps me hard across the face," Fallon told Willie Geist on Sunday Today.

The two friends had lots to reminisce about in their look back at filming the 2005 Red Sox romantic comedy.

The "Risk" singer told Jimmy Fallon she basically "blacked out" while singing onstage with Swift. 

Fallon and the Encanto composer donned muscle-y arms for "Surface Pressure" and green ponchos for "We Don't Talk About Bruno."

Watch the cast rock out on "Masquerade" in the cast's late-night debut.