Arnold Schwarzenegger went undercover at Gold's Gym in California to promote fitness recently.
The Hollywood movie star and former governor of California dressed in a disguise, posed as a man known as Howard Kleiner, News.com.au reported.
He was there to promote and raise funds for After-School All-Stars, a nationwide program that provides free mentorship, homework help, tutoring and fun activities to students from low-income families.
In a video promoting the stunt, Schwarzenegger is seen getting in his disguise, which includes a wig, moustache and baseball cap.
He then walks around the gym, talking to members about their training and he gives them tips on their training.