Actress Amber Heard reportedly makes all the decisions in her relationship with Johnny Depp.

The 27-year-old actress is believed to have just got engaged to her 'The Rum Diary' co-star and friends say she's the woman who has finally tamed him, reported People magazine. "Amber has called the shots since day one, dictating when they went public, for example.

She's half his age and that's part of why he'll do whatever she wants in order to keep her," a source said. "He has definitely toned down his behaviour since he started dating Amber. He acts like a mature and charming man now."

The 50-year-old actor, who has daughter Lily-Rose, 14, and son Jack, 11, with former partner Vanessa Paradis, is said to be attracted to the way Heard has her own way of doing things and doesn't 'go with the flow'.

"Amber is a female version of Johnny. She's sort of kooky and outspoken, and while that would intimidate many guys, it is a turn on for Johnny," the source said.