Action switch demanding for Heigl

Katherine Heigl got bored shooting ‘Killers’.

The actress had never appeared in an action movie before working on the forthcoming assassin film, and admits she struggled to get to grips with the more physical scenes.

She said: "I'm not a fan of the action genre! It was actually quite painstaking and I'm the most un-coordinated clumsy, klutzy person, so I always had a bruise, I always tripped and fell. I'd be trying to be serious running whilst a car tries to chase me down and I would still look so stupid and so it got a little boring.”

Despite her experience on the film – which also stars Tom Selleck as her retired contract killer boyfriend – Heigl hasn’t ruled out a return to the genre in future.

She added: “I think I'll give it a go one more time, but I think I'd have to get in shape or something beforehand.”