Arnold Schwarzenegger records voicemail for fans - video
Hopefuls can enter via his official website for a chance to win the action hero record a personalised message.
The Expendables 2 actor has uploaded a video of himself recording a Predator-themed message for the first lucky winner, complete with catchphrases and the sound of a fake gun.
Schwarzengger has opened up the competition to promote his upcoming autobiography Total Recall: My Unbelievably True Life Story, released on October 1.
The star will next be seen in The Last Stand, to be released on January 18, 2013 in the US and on January 25, 2013 in the UK.