Mel Gibson, Ex-Wife Robyn Reunite For Special Birthday Party

Michael Söze

Actor Mel Gibson and his ex-wife Robyn -- along with 3 of their children and 3 of their grand-kids -- briefly reunited for a charity event hosted by Mending Kids International, where they celebrated the 10th birthdays of former conjoined twins Maria de Jesus and Maria Teresa Quiej-Alvarez.

The twins, separated in a painstaking 23-hour procedure at Ronald Reagan UCLA Medical Center back in 2002, have always been close to the Gibsons, and the former couple agreed to make a rare public appearance together to spend their birthday celebrations with them.

"We're all involved in Josie and Teresa's lives," Mel told PEOPLE magazine, referring to the girls by their nicknames. "It's incredible seeing Josie and Teresa do so well. Listening to Josie speak, you think, 'Man, this is the happiest kid I've ever seen.' "

Later on in the event the former couple were honored for their support of the charity, which provides life-changing surgical care for children worldwide.

Of working with the organization, Gibson said:

"It gives you perspective." He elaborated, "It's one of my faults, you tend to focus on yourself a lot. Which is not always the healthiest thing for your psyche or anything else. If you take a little time out to think about other people, it's good. It's uplifting."