Dakota Fanning: Gym Time!

Dakota Fanning chats on her cell phone as she arrives at the gym on Friday afternoon (March 15) in Studio City, Calif.

The 19-year-old actress held onto her Arrowhead water as she headed inside for a workout.

PHOTOS: Check out the latest pics of Dakota Fanning

It was just recently announced that Dakota will star opposite Danielle MacDonald in Every Secret Thing.

The story follows two 11-year-old girls who are convicted of murdering a baby and are incarcerated until they turn 18 (Fanning, Macdonald). Upon their release, children start to go missing; as the police turn their attention to the duo, the mystery surrounding the original murder comes back to light.

10+ pics inside…