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Arnold Schwarzenegger pranks fans as wax Terminator at Madame Tussauds

Action movie icon Arnold Schwarzenegger gave fans more action than they were expecting during a prank at Madame Tussauds wax museum in Hollywood, Calif.

The 67-year-old movie star also took the gag for a walk around Hollywood

Arnold Schwarzenegger, dressed as his iconic Terminator character, sends fans screaming at Madame Tussauds wax museum in Hollywood. The actor's stunt, shared in a video on his YouTube page, was designed to promote a U.S. charity and his upcoming Terminator Genisys movie. (Arnold Schwarzenegger/YouTube)

Action movie icon Arnold Schwarzenegger gave fans more action than they were expecting during a prank at Madame Tussauds in Hollywood, Calif.

Video of the stunt, posted Wednesday on the actor's YouTube account, shows unsuspecting guests posing with what they thought was a wax version of the Terminator, only to have him come to life.

"What's the matter?" asks Schwarzenegger after his sudden movements send two women running, screaming across the museum floor.

The stunt was designed to bring attention to a U.S. youth empowerment charity, After-School All-Stars.

Arnold vs. Arnold

It also saw the 67-year-old former governor of California take an in-character walk around Hollywood, where he interrupted an Arnold impersonator posing with a group of tourists.

"Who are you?" asks the real Arnold.

"I'm the Terminator," replies the imposter posing as the legendary cyborg assassin.

Terminator star Arnold Schwarzenegger, right, squares off with an Arnold impersonator while Hollywood tourists watch, amazed. (Arnold Schwarzenegger/YouTube)
The scene unfolds with the leather-wearing rivals squaring off in an Austrian accent competition using Schwarzenegger's signature catch phrase, "I'll be back." 

Schwarzenegger is also ramping up promotion for Terminator Genisys.

​The highly-anticipated series reboot of James Cameron's original 1984 film is due out on July 1.

Director Alan Taylor (Thor: The Dark World) is at the helm of the science fiction thriller, which is intended to be the first film in a new trilogy

The Terminator franchise has already earned $1.4 billion US.