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Step Up Revolution star Ryan Guzman shocked moviegoers at a screening of the dance flick on opening night and even held a mini dance-off.

Ryan decided to spend his Friday night with fans watching Step Up Revolution at a theater in Burbank, CA. The star met with fans, posed for photographs, signed autographs and even shared some personal home movies.

VIDEO: Flash Mobs Explode in Step Up: Revolution

"That was crazy -- it was fun though. I mean the fans are amazing," Ryan told ET about his exciting night. "I felt bad though, a couple of fans were shaking so much because they were so nervous and excited to see the actual guy in the movie."

Watch the video to see Ryan plot his secret theater surprise and to hear about holding a "dance-off" with some talented fans.