Hollywood film star Johnny Depp is engaged to marry his "Rum Diary" leading lady Amber Heard, UsMagazine.com reported Friday. Heard, 27, was spotted this week wearing a large diamond on her ring finger. "The proposal happened a while ago," one insider told the magazine. "She just didn't wear the ring." Depp, 50, split from his longtime partner, Vanessa Paradis, in 2012. They have a daughter Lily-Rose, 14, and son Jack, 11.