Mel Gibson has filed a restraining order against the mother of his illegitimate seven-month-old daughter, RadarOnline.com has learned exclusively.
In a blockbuster development in his bitter break-up with Oksana Grigorieva, the 54-year-old actor lodged the paperwork under seal at the Los Angeles Superior Court in Downtown Los Angeles Thursday.
The plaintiff is listed as Mel Gibson and the defendant is Oksana Grigorieva.
Grigorieva was served the documents at her home in Sherman Oaks around 5pm Wednesday, RadarOnline.com confirmed.
While the case is sealed -- meaning the documents cannot be released to the public -- RadarOnline.com has learned the complaint centers around three issues and Gibson's access to daughter Lucia.
Gibson filed a temporary restraining order, a notice about a forthcoming court hearing and a notice of visitation rights and child custody.
Gibson's rep had no comment when contacted by RadarOnline.com.
Gibson and Grigorieva, the Russian musician-singer, split in April, after over a year of dating.
At the time, the split was described as amicable and the pair said they planned to co-parent.
However, Grigorieva hinted the break-up was complicated: "We have split up, suddenly and recently... Unfortunately, I cannot give you the reason. But you will find out everything quite soon."
In April of last year, Gibson's wife Robyn filed for divorce after 30 years of marriage. Later that month, he and Grigorieva made their first public appearance together as a couple.
In addition to Lucia, Gibson has seven children -- six sons and a daughter -- while Grigorieva has a son, Alexander, with her former boyfriend, actor Timothy Dalton.