The Taken star is backing Quinn for office ahead of the Big Apple's mayoral election in November (13), when New Yorkers will go to the polls to decide on a replacement for incumbent leader Michael Bloomberg.
Voicing his support for the flame-haired politician, he says, "I am proud to endorse Chris Quinn to be our next mayor. I was an amateur boxer before I was an actor - and I know a good fighter when I see one. No one will work harder than Chris Quinn for New Yorkers who need a fierce advocate in City Hall."
The pair has met before - Quinn presented the star with the Thomas Manton Irish Man of the Year Award in March (13), on the fourth anniversary of the death of his wife Natasha Richardson.
Quinn's Irish grandmother emigrated to the U.S. aboard the doomed Titanic liner in 1912. She survived the disaster.