Peter Mcmahon is 93 years and 4 month(s) old. He was born in 16 Jul, 1931. No, we are not talking about the Portadown footballer Peter McMahon. Yeah, you have hacked it. Today, the subject of discussion is American (turned citizen in 2006) businessman Peter McMahon, who we know as the husband of the famous Dana Perino, who is an American political pundit and was the 27th White house Press Secretary.