Christina Applegate. Actress: Don't Tell Mom the Babysitter's Dead. Christina Applegate was born in Hollywood, Los Angeles, California, to record producer/executive Robert Applegate and singer-actress Nancy Priddy. Her parents split-up shortly after her birth. She has two half-siblings from her father's re-marriage - Alisa (b. October 10, 1977) and Kyle (b. July 15, 1981). Alisa and Christina are best friends and even lived together while Alisa was going to college....