Mackenzie PhillipsMackenzie Phillips is the daughter of John Phillips and stepdaughter of Michelle Phillips, both lead singers of the 1960s band The Mamas & the Papas. She starred as Julie Cooper Horvath on the sitcom One Day at a Time alongside Valerie Bertinelli. Toay, Mackenzie works at Breathe Life Healing Center in West Hollywood as a substance abuse counselor. Read More Read Less