• BREAKING NEWS ABC shows live and on-demand -- Download the WATCH ABC app!

OTRC: Mel Gibson reunites with estranged wife for formerly conjoined twins birthday party

Mel Gibson and his estranged wife Robyn reunited on Saturday for the birthday of formerly conjoined twins, Maria de Jesus and Maria Teresa Quiej-Alvarez.

"We're all involved in Josie and Teresa's lives," Gibson 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.'"

The Guatemalan twins, who were formerly conjoined at the skull, underwent separation surgery in 2002. They turned 10 years old on August 6 and celebrated with a Hawaiian-themed party in the Malibu hills, hosted by the Mending Kids International charity.

Gibson and Robyn spent time with three of their grandchildren at the event, where they were honored for their support of the charity, which provides surgical care for children worldwide.

"We gave them financial support, but it was hands-on sometimes. I remember Robyn taking care of children who came here [for surgery]," Gibson said. "All of my kids do give back. Our children have been raised that way and that will be an integral part of their lives as they move on."

Robyn was formerly the president of the board of directors and Gibson recently returned from two medical trips to Guatemala and Panama, where he completed community service for misdemeanor battery charges against his former girlfriend, Oksana Grigorieva.

Gibson and Robyn Gibson will reportedly reach their divorce agreement and have a judgment ready by August 30.

Robyn Gibson filed for divorce in April 2009 after 26 years of marriage and just months before the actor's then-girlfriend, Oksana Grigorieva, gave birth to a baby girl named Lucia.

The two have seven children together. All are adults aside from the couple's son Thomas, who is 12. Gibson cited in his court filings that the couple separated in 2006. There were no additional details on how their assets will be divided.

Gibson was sentenced in March to informal probation for 36 months, 16 hours of community service with Mending Kids International, a 53-week domestic violence program, continued mental health counseling and a $400 domestic violence fine for his misdemeanor battery charges against Grigorieva, to which he pleaded no contest. If he violates his probation, Gibson could face up to a year in prison.

The former couple is still engaged in an ongoing custody battle over their infant daughter.

Grigorieva and Gibson are believed to have broken up around April 2010 after being linked together for about a year. She had dropped her domestic violence claim because she wanted to extend an olive branch to Gibson, her other attorney, Ron Litz told OnTheRedCarpet.com in May.

Meanwhile, Gibson is trying to revive his film career. His latest movie, "The Beaver," flopped at the box office. He will next appear in the dark comedy, "How I Spent My Summer Vacation."

(Copyright ©2018 OnTheRedCarpet.com. All Rights Reserved.)