For all of us wondering what the reason was behind Johnny Depp bleaching his dark hair blonde, your question has been answered. The star's bright tresses are for his latest film "Mortdecai," but we have to wonder if girlfriend Amber Heard has become a fan of his lighter hue.

According to E! News, the newly blond actor, who debuted lighter locks last month at the London Film Festival, was photographed on the set of the movie "Mortdecai" in London on Monday.

Johnny Depp, 50, looked quite handsome as he made his way around set in a black suit that featured a colorful tie and pocket square.

Adding to the look, the actor wore gloves and held onto a cane that he used to walk with and despite his blonde hair, "The Lone Ranger" star wore a dark mustache.

Depp was also snapped earlier in the day wearing a different suit but still held on to his cane which means it most likely will be featured throughout the film.

The actor joined his costar Paul Bettany, who wore a turtleneck sweater and leather jacket as the two shot their scenes.

According to E! News, "Mortdecai" also stars Gwyneth Paltrow, Olivia Munn and Ewan McGregor. The movie will follow the journey of an art dealer named Charles Mortdecai who searches for a stolen painting that is said to contain a secret code that can access hidden Nazi treasure.

To see a photo of Johnny Depp on the set of his latest film rocking his blonde hair click HERE.