Amber Heard engaged to Johnny Depp?

Los Angeles: `The Rum Diary` star Amber Heard has sparked engagement rumours with Johnny Depp after she was spotted with a huge diamond rock on her left hand. The 27-year-old bisexual actress, who is said to be in a relationship with the superstar, caught the eyes of paparazzi while she was leaving a restaurant recently with the ring, reported E! Online. According to a source, Heard and another woman dined at Ago, and as she left the actress did everything she could to shield her left hand from photographers. She even waited for a valet driver to open her car door so that she did not have to show her ring finger. Amber and Depp, 50, first met when they starred together in 2011`s `The Rum Diary`. The duo reportedly made their official red-carpet debut as a couple recently at the Art of Elysium gala at LA`s Skirball Center.