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OTRC: Mel Gibson is overjoyed' by his third grandchild's birth, report says

Mel Gibson appears in Los Angeles Superior court on March 11, 2011. (ABC)

Mel Gibson is a grandfather again.

The actor's daughter Hannah, 30, recently gave birth to a baby boy. "He gets that way around babies. ... He was overjoyed," a source close to the 55-year-old actor told People magazine.

The baby is Gibson's third grandchild as Hannah, the eldest child and only daughter of Gibson's with his ex-wife Robyn, and her husband Kenny Wayne Shepherd, a singer, have another son and daughter. Gibson has six sons with his ex-wife. The two divorced in 2009 after 28 years of marriage.

On Friday, a Los Angeles court accepted Gibson's plea bargain on charges of misdemeanor battery against his ex-girlfriend Oksana Grigorieva, from a January 2010 confrontation. The actor was sentenced 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. If he violates his probation, Gibson could face up to a year in prison.

Gibson's lawyer made it clear that the actor was not admitting guilt but was "entering into plea because it's in the best interest of his children." Grigorieva, who is also the mother of their baby daughter Lucia, waived her right to appear in court.

The 55-year-old actor has yet to comment publicly on the case.

Grigorieva, a 40-year-old Russian musician, gave birth to Gibson's daughter in October 2009. They broke up in April 2010. The following summer, she accused him of assaulting her the previous January at his Los Angeles home.

A recorded racist, sexist and explicit rant Gibson is said to have made against Grigorieva over the phone was then released. He has not confirmed it is his voice on the recordings, which were posted on the website RadarOnline.

In October 2010, Los Angeles authorities wrapped up an investigation of Grigorieva's claim that Gibson punched her in the face during the incident and harmed Lucia, as they argued in front of her teenage son Sacha.

Gibson has denied he punched her and said in court documents filed in June 2010 that he slapped Grigorieva during the January confrontation in a bid to protect their baby, who she was holding in her arms at the time.

Grigorieva said on CNN talk show "Larry King Live" in November 2010 that she was willing to forgive Gibson as the two continue a bitter custody battle over Lucia.

Grigorieva also recalled happier times with Gibson, saying he used to carry her around in his arms and call her his "little Communist" as a joke.

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