Johnny Depp and his Rum Diary co-star Amber Heard are reportedly "100 per cent dating."

The 49-year-old actor split from his estranged wife Vanessa Paradis after 14 years of marriage this month. The pair share two children together: Lily-Rose, 13, and Jack, nine.

Johnny is thought to have quickly moved on to a new love commitment with Amber.

"They are 100 per cent dating," a source told Us Weekly magazine.

"He treats her really well."

Bisexual Amber recently split from her former girlfriend artist Tasya van Ree. Johnny and Amber are rumoured to have begun seeing each other when The Rum Diary was released last fall.

"They started sleeping together during the press tour," the source continued.

Amber, 26, is said to be a "regular visitor" to the set of The Lone Ranger in New Mexico where Johnny is currently shooting.

According to British newspaper The Daily Mail, Johnny is even said to have bought Amber a horse "so they can ride together" in the desert, as reported in Globe magazine.