Hayden Panettiere: Gym Day!

Hayden Panettiere wears her hair up in a messy bun as she leaves the gym on Tuesday (June 26) in Brentwood, Calif.

The 22-year-old actress was joined by a mystery guy as she crossed the street and headed to her car.

PHOTOS: Check out the latest pics of Hayden Panettiere

This fall, Hayden can be seen in her new ABC series, Nashville.

The show revolves around the city’s vivid music scene focusing on one star at her peak and another on the rise.

10+ pictures inside of Hayden Panettiere…