Actor 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 who withdraws from his job after falling in love with a woman, played by Heigl.“He worked hard and was really nervous going, ‘Do I look alright, do you think I look okay?’ It was really endearing and charming!” she added.