The Miami Vice star, who has been dating fellow Dubliner Muireann McDonnell since December, insists the 22-year-old medical student is "a great girl" and the pair is "really happy" together.
He says, "I met her in Dublin while I was home from L.A."
"She's a great girl, we're really happy. It's easy to find girls, but it's not easy to find the right one."
Last month, McDonnell's ex-boyfriend John Mark Knight committed suicide after struggling to cope with his former love's relationship with the Hollywood star.
COPYRIGHT 2007 WORLD ENTERTAINMENT NEWS NETWORK LTD. All Global Rights Reserved.