Laura Mackenzie Phillips is an American actress. Her best-known roles include Carol Morrison in the film American Graffiti, Julie Mora Cooper Horvath on the sitcom One Day at a Time, and Molly Phillips on Disney Channel’s supernatural series So Weird.

American Graffiti is a 1973 American coming-of-age comedy-drama film directed by George Lucas, produced by Francis Ford Coppola, written by Willard Huyck, Gloria Katz and Lucas, and starring Richard Dreyfuss, Ron Howard, Paul Le Mat, Harrison Ford, Charles Martin Smith, Cindy Williams, Candy Clark, Mackenzie Phillips, Bo Hopkins, and Wolfman Jack. Set in Modesto, California, in 1962, the film is a study of the cruising and early rock 'n' roll cultures popular among Lucas's age group at that time. Through a series of vignettes, it tells the story of a group of teenagers and their adventures over the course of a single night.