The star stepped out with his mother Rita and sister Claudine on either arm for his brother Eamon’s birthday party last Monday night.
The party was held in one of Dublin’s most popular venues, Krystle nightclub.
With his hair pulled back, Farrell kept it casual in a check shirt, grey cardigan, grey jeans and a black leather jacket.
The Dublin born actor recently split from actress Alicja Bachleda, the mother of his one-year-old son Henry .
The actor’s latest film “The Way Back” was released this week and tells the story of a group of soldiers who escape for a Siberian gulag during World War II and escape to India.