Michael J. Fox made an appearance during Sunday's ceremony to present the award for Achievement in Film Editing alongside Seth Rogen. In a pre-produced video package introducing the pair, Rogen waxed poetic about the influence of Fox's beloved 1985 film, Back to the Future.
Moments later, entering the stage in a DeLorean, natch, Fox and Rogen emerged to a standing ovation from the audience.
"I'm gonna pretend half that applause is for me, even though I know, deep down, it is not," Rogen joked, pairing his tuxedo with a pair of Nike's new Future-inspired self-lacing sneakers.
"Some of it was for you," Fox replied.
"You think, like, 30 percent of it was for me?" Rogen asked.
After a brief pause, Fox deadpanned: "Some of it was for you."
The duo continued their bit with a delightfully awkward sing-a-long.
"I'm a the Oscars with Michael J. Fox, a DeLorean, while wearing Future shoes," Rogen gushed. "All I have to do is sing the Schuyler Sisters song from Hamilton in front of the world and I will have completed my entire bucket list."
With Hamilton mastermind Lin-Manuel Miranda looked on laughing from the audience, Rogen launched into the song while prompting Fox to reluctantly, but adorably, chime in.
Fox's appearance comes just days after he participated in the UTA United Voices Rally on Friday, held in lieu of the agency's usual swank after-party.
The Canadian-born actor and Parkinson's activist said that his admiration for American principles and values was why he became an American citizen 20 years ago. "And it was a tough process," he revealed to the crowd. "It took about eight years from soup to nuts, from start to finish. And I complained about how long it took -- my visa, then my green card, and then finally I was sworn in as a proud American. And I think, like, what was I bitching about?" he joked.
As Fox continued, his tone turned serious. "There are people that are giving everything, that have lost everything they have and they're struggling to keep their families alive, and to keep food in their mouths and disease away from their bodies -- and at tremendous risk to get here, to this country. And then we say, 'No'?" he continued. "It's an insult on human dignity."
During Sunday's celebration, many stars chose to stand with the American Civil Liberties Union by wearing blue ribbons on the red carpet. Nominee Ruth Negga spoke with ET about why she stands with the ACLU. Watch below.