Dean Gerard Winters is an American actor. He is probably best known for his role as Ryan O'Reily on the HBO prison drama Oz and Johnny Galvin in the FX TV series Rescue Me. He also guest-starred in TV shows such as CSI: Miami and 30 Rock. He can also be seen frequently starring as "Mayhem" in advertisements for All-State Insurance.

For Disney, he voiced Andrew in the Tangled: The Series episode "Under Raps".

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