"I saw Part II in the theaters, and I saw Part III in the theaters. Both times I went by myself and slumped down in the seat and watched the movie with everyone else. It’s funny that Elizabeth Shue got the part, because I’d screen tested for Adventures in Babysitting. That role had come down between her, me, and Phoebe Cates. So, the fact that she wound up getting my role in Back to the Future is a funny synchronicity.This has happened ever since, a small pool of actresses working around projects. My guess is it's something like Emma Stone, Mila Kunis, Jennifer Lawrence, Michelle Williams and for a time Carey Mulligan with Shailene Woodley in there too.
"Almost every movie in the 1980s came down between the three of us and Sarah Jessica Parker. It was the same group, no matter how many people auditioned, it was almost always the same people it came down to, just switching up who got it. Phoebe Cates got Gremlins, and then I got Phoebe Cates’ role, Linda Barret, in Fast Times [the TV series]. So, literally, it was a very small group of people that got most of the parts.
"There was one audition one morning where Sarah Jessica Parker and I were trying for the lead in a movie, and then that afternoon it was between the two of us for the starring role in Martin Sheen’s directorial debut, Babies Having Babies. When I saw Sarah again that afternoon, I went to her and said, “Sarah, let’s make a deal. You get one part, and I’ll get the other. Let’s shake on it.” [Laughs] As if we had any power. So we shook on it, and she got the morning part, and I got the afternoon part."
As a bonus, here's Wells giving an interview in French: