The wedding celebrations of Colin Farrell’s gay brother were a family affair last night at Krystle nightclub on Harcourt Street in Dublin.

Farrell’s brother Eamon was marking his marriage to his longtime partner, Irish artist Steven Mannion. Colin was in Dublin for the party, bringing his five-year-old son James with him.

Colin’s father, Eamon Sr., his mother Rita, and his sisters, Claudine and Catherine, were also at the bash, along with other high-profile Dublin socialites.

James is Colin Farrell’s first son, whom he had with former girlfriend, American model Kim Bordenave. At an early age the boy was diagnosed with a rare form of cerebral palsy called Angelman Syndrome. The illness causes seizures and problems with balance, and delays a child’s development. But one of its other symptoms is happiness and frequent laughter, caused by changes in the brain’s pathways brought about by the condition.

Farrell has often spoken about his love for James. “'There is no heartbreak about it, it's not a sad story. I'm incredibly blessed to have him in my life,” he said in an interview.

Although this is a time of celebration for the Farrell family, the clan has had other issues to contend with recently, too. The newlywed Eamon has expressed disappointment that he and Steven could celebrate in Ireland but they could not formally wed here. The Irish Civil Partnership Bill brought in earlier this year gives gay people many of the same rights as hetersexuals, but does not legislate for marriage. As a result Eamon and Steven got married in Vancouver, Canada, over the summer, where same-sex marriage is legal.

"We have to get married abroad," he complained in an interview at the time. "It's absolutely terrible. We have to go somewhere legal, which narrows it down to about five countries.

"Who wants a civil union? It's just so legal. I want to be able to get married."

Farrell was best man at his brother’s summer wedding.