What is the name of Marty McFly's girlfriend in the film "Back To the Future"?

Can’t believe they’re going to remake Back To The Future it’s a classic!

Any remake of Back to the Future will not be a success.. this movie without a doubt is Micheal J Fox staple he owns it.

Seems that Hollywood is only interested in remakes/updates, long term span sequels, bio pics or comic book movies. Truly pathetic, IMO.