Amber Tamblyn

Actor-comedian David Cross and his longtime girlfriend, actress Amber Tamblyn, are engaged to be married, her rep confirms to PEOPLE.

Tamblyn, 28, the daughter of veteran actor-dancer Russ Tamblyn (Seven Brides for Seven Brothers, West Side Story), first became a TV name as the lead in the 2003-06 fantasy drama series Joan of Arcadia. Currently, he stars in the British-American comedy TV series The Increasingly Poor Decisions of Todd Margaret.

Amber Tamblyn

"Arrested Development" actor David Cross, 47, recently got engaged to "House" actress Amber Tamblyn, 28, the actor's reps confirmed to OnTheRedCarpet.com on Wednesday.
Tamblyn rose to fame playing Emily Quartermaine on the soap opera "General Hospital" and starred on the CBS series "Joan of Arcadia." Tamblyn's real-life father is "West Side Story" actor Russ Tamblyn, who played the leader of the Jets gang in the movie musical.
Cross also had a recurring role on the FOX comedy series, "Running Wilde."
Cross currently appears in IFC's original comedy series, "The Increasingly Poor Decisions of Todd Margaret." Will Arnett stars as Margaret's boss.