Tom Cruise and Katie Holmes not only jogged together in Boston

Hollywood stars Tom Cruise and Katie Holmes enjoy going for a run together.

But they took it one stage further and bizarrely appeared to hold hands during their jog.

The joined-at-the-hip pair took to the streets of Boston, Massachusetts, where Tom is currently filming his latest movie with Cameron Diaz - comedy flick Knight & Day.

Dressed in comfortable sweats, the stars put on the very public show of togetherness - although Katie kept her iPod on throughout.