True, she is a recent high school graduate, but Dakota Fanning isn’t going through a rebellious phase with her hair. The actress — spotted this week on the London set of her latest film, Now Is Good — is just donning a wig for her role in the movie, her rep confirms to PEOPLE. Fanning stars in the drama, which centers on a girl checking experiences off her bucket list as she’s dying from leukemia. It’s a far cry from the 17-year-old’s looks for more recent roles in the Twilight saga and The Runaways, and her recent campaign for Marc Jacobs’s Oh, Lola fragrance. She’s the latest in a series of stars — including Anna Faris and Sandra Bullock — to don fake hair for a role.