Mackenzie Phillips

Laura Mackenzie Phillips (born November 10, 1959) is an American actress and singer best known for her roles in American Graffiti and as rebellious teenager Julie Mora Cooper Horvath on the sitcom One Day at a Time. She is more recently known for her role in the Disney Channel science fiction show So Weird. She will voice Principal Milder in the upcoming Disney XD series Milo Murphy's Law.