The 30-year-old actress had accused Stanhope of smear campaign after he called her a liar in a scathing letter, reported TMZ.
"Amber is moving on, getting back to work and leading a normal, happy life," a source said.
In his scathing letter to defend Depp, Stanhope called Heard a liar for fabricating the abuse story. Stanhope claimed Heard had manipulated and blackmail Depp.
Stanhope is not the only one defending the "Black Mass" actor. His ex Vanessa Paradis and daughter Lily-Rose Depp are on supporting him as well. Fellow stars like Paul Bettany, Benicio Del Toro and Marilyn Manson are also on his side.