Hilary Duff & Mike Comrie: Workout Partners!

Hilary Duff and fiance Mike Comrie head out after a workout with celebrity trainer Harley Pasternak on Tuesday (June 22) in West Hollywood.

The two have been training with Harley for over a year! Other celebs who work up a sweat with Harley include Megan Fox and Amanda Seyfried.

Hil, 22, rehydrated with Smartwater after her workout.

10+ pictures inside of Hilary Duff and Mike Comrie leaving Harley Pasternak‘s place…