Amber Heard Makes Big Change For Johnny Depp To Save Marriage

Over five months after she got hitched to Johnny Depp in a tropical paradise, Amber Heard is scrambling to repair their rocky relationship.

Her first order of business? The 29-year-old is proving her commitment to Depp, 52, by changing her last name.

"She's keeping her maiden name professionally, but legally, she has changed it to Depp," an insider tells OK!. "It's her way of trying to prove to him that she's in it for the long haul."

So far, so good, notes the insider. "Things have calmed down — they're not fighting and really seem happy!"