Hayden Panettiere frustrated her boxer boyfriend Wladimir Klitschko during the making of her new movie Scream 4 - because she refused to tell him the film's top secret plot twist.
The Heroes actress appears in the horror sequel alongside the franchise's original stars David Arquette, Courteney Cox and Neve Campbell - and she was ordered to keep the identity of the film's ghostface killer quiet.
Klitschko admits he pestered Panettiere to give up the secret, but she refused, and made him wait until an official screening of the film to find out.
He tells the New York Daily News, "She never told me who the killer was and what's going on in the movie. I've been asking for all these days and weeks."