Michael J. Fox, Christopher Lloyd, Lea Thompson, and Tom Wilson reunite in "Back to the Future"

Stars Michael J. Fox, Christopher Lloyd, Lea Thompson, and Tom Wilson reunited at Fan Expo Portland over the weekend, more than 37 years after the original Back To The Future movie was released.

Thompson, who portrayed Lorraine in the first two installments of the franchise, posted a selfie to Instagram with Fox, Lloyd, and Wilson.

“Wow, honestly had the best time today with my #bttf family,” Thompson wrote alongside the photo. “So many fun fan moments too and a llama,” she added.

In addition, Thompson uploaded videos, one of which featured her and Lloyd, the eccentric scientist who portrayed Dr. Emmett "Doc" Brown in the franchise. "Look who’s here. Look what the cat dragged in,” Thompson exclaimed with a grin.

Photos of his former co-stars were shared on Fox's Instagram story, where he played the time traveler Marty McFly.

“I love being at these FanExpo events and seeing some of my favorite people like Lea, Tom, Chris and all you #bttf heads. Heavy,” he wrote.

In addition, Wilson, who played Biff Tannen on the show, posted a selfie of the four of them with the caption, “Okay, so this happened. 2023”

“I’m a butthead, right?” Thompson asked Wilson in one of her videos, quoting his character’s classic insult from the films. Wilson then channeled his character, gently knocking his fist on Thompson’s head, playfully asking, “Hello, anybody home?”

The original 1985 version of Back to the Future, directed by Robert Zemeckis, was followed in 1989 by Back to the Future Part II and 1990 by Back to the Future Part III.