Timothée Chalamet still can't believe he's on the cover of a Wheaties box. The actor, 29, addressed his limited-edition Wheaties "Marty Supreme Box" during an appearance on the Wednesday, December 17 edition of The Tonight Show Starring Jimmy Fallon. Fallon, 51, beamed as he held up the box, which features a very serious-looking Chalamet as the fictional table-tennis champ Marty Mauser, whom he portrays in the upcoming film Marty Supreme. "This is what I'm talking about," Fallon gushed.