London, June 18 (ANI): Ashton Kutcher was ‘really nervous’ about stripping off for a scene in his upcoming flick ‘Killers’, revealed his co-star Katherine Heigl.

Kutcher plays an undercover assassin in the movie who withdraws from his job after falling in love with a woman, played by Heigl.

The actor has spent weeks shaping his physique before filming the scene.

But besides this, Kutcher was still worried about appearing topless on-set, said Heigl.

“Ashton spent that entire day worried about how he looked on camera, like anybody would, because he knew he’d be shirtless for that whole entire scene,” the Daily Star quoted her as telling Britain’s Live from Studio Five.

“He worked hard and he was really nervous going, ‘Do I look alright, do you think I look okay?’ It was really endearing and charming!” she added.

Director Robert Luketic, who admitted that he was shocked by Kutcher’s workout regime, said: “He arrived in France and walked in and took his shirt off and said, ‘Is this built up enough?’ and I said, ‘Who’s your trainer?’ and he said, ‘I did it from one of those DVDs you buy on late night television.’ He was serious - he didn’t have a trainer.” (ANI)