Lea Thompson was accompanied by her daughter, Zoey Deutch, to the classic movie's special 30th anniversary screening in New York City on Wednesday, where the 20-year-old actress bared so much likeness to her mom, 54.
Thompson, who played Marty McFly's (Michael J Fox) mom, Lorraine, in the iconic trilogy, told ET on the red carpet that after all these years, the Back to the Future line that gets repeated to her the most is not even one of her own!
"You're my density," she said, referring to George McFly's verbal mishap from the movie. "It's not my line, but people always come up to me and say 'you're my density.'"
As for the technology Thompson wishes would have made it from the movies to real life: hoverboards, duh!
"I mean, that would be fun. I recently tried, they made me pretend I was on a hoverboard and it was a lot of work," she revealed. "Like, a fake hoverboard is a lot of work. I have a lot of respect for those stunt people 'cause you're really basically doing the crunches. You know, you're like on wires doing crunches. It's hard."
Back when the movie came out in 1985, Thompson told ET Back to the Future was a challenging role, because she had to play Lorraine at different points in her life.
"There was a great challenge in Back to the Future because I was the old lady and really drunk, then I got to be the young '50s girl," she said at the time. "That was a real nice challenge but then I got really tired of [it]."