He was born in Chicago, Illinois[2][1] and started acting at the age of 7.
[2] O'Leary received a degree in acting from Illinois State University[2] and in 1982 received an MFA from the University of Washington's Professional Actor Training Program.
[2] O'Leary made his Broadway debut in 1986 alongside Ed Harris and Judith Ivey as Art in Precious Sons at the Longacre Theatre.
[3] He played Marty Taylor, the younger brother of Tim Taylor (Tim Allen), on Home Improvement, and was the primary antagonist, General Xaviax, on Kamen Rider: Dragon Knight.
This article about a United States film and television actor born in the 1950s is a stub.