Hilary Duff and her boyfriend Mike Comrie got fit together at a personal trainer’s home in Los Angles yesterday(July 22).

Despite the unbearably hot weather, the couple looked fit and happy as they admirably kept up their fitness schedule.

Hilary is getting her body in tip top shape as she’ll soon begin filming a multi-episode arcs on the CW’s Gossip Girl.

She plays Olivia, the newest fabulous Upper East Sider who happens to like that Dan [Penn Badgley] doesn’t recognize her as a famous movie star.