Gibson's daughter, Hannah, and her husband, blues singer Kenny Wayne Shepherd, welcomed a baby boy over the weekend, reports TMZ.com. The couple already has two children.
The good news follows Gibson's court appearance on Friday (11Mar11), when the actor/director was sentenced to three years probation and ordered to undergo a year of counselling after pleading no contest to a charge of simple misdemeanour battery.
The embattled star's latest legal woe stems from accusations filed against him by his ex-girlfriend Oksana Grigorieva, who alleged Gibson attacked her during a heated argument in January 2010.
The former couple has been locked in a war of words over custody of their baby daughter Lucia since splitting last year (10).