Irish actor Colin Farrell has a new stepfather in his life after his mother found love again in her 70s.

The Phone Booth star reveals his mum Rita is a newlywed after deciding to tie the knot with a man called Joe following a whirlwind romance.

He tells U.S. talk show host Jimmy Kimmel, "She found herself a really good man... They got married six months ago.

"We threw her a wedding. A wedding was thrown in the back garden, so it wasn't very far...

"(They took) the fast track to love. They met... a little over a year ago, and they lived in sin for six months (before marrying)."

Farrell insists he has nothing but love for the new addition to his family, but he couldn't help but have a little fun with the 74 year old before giving Rita and Joe his seal of approval.

The 37 year old says, "I met him and vetted him and asked him what his intentions were... what his future was looking like... we've all got a future! He's a wonderful, wonderful man."

Rita was previously married to the actor's father, Irish soccer player Eamon Farrell.