How do you find an mailing address for a movie actor?

My 1934 Chevy and I were cast as a period correct picture car in Michael Mann’s “Public Enemies” for filming in Chicago this past spring. Actor Peter Gerety (playing Dillinger’s attorney) drove my car into a scene with Johnny Depp as John Dilliger. I want to contact Gerety to ask if he would sign a copy of a picture of my car taken on the set the day he drove it.