Joaquin Phoenix: Mustache Man in Metro!

Joaquin Phoenix is all smiles on the set of the currently untitled Spike Jonze project he’s filming on Friday (June 8) in Hollywood.

The 37-year-old mustachioed actor was filmed running through a metro station.

PHOTOS: Check out the latest pics of Joaquin Phoenix

The movie, which also features Olivia Wilde, Rooney Mara, and Amy Adams, is about a man who falls in love with a computer’s voice. The comedy is slated for release next year.

10+ pictures inside of Joaquin Phoenix working on a scene for his new movie…