Mel Gibson, Girlfriend Call It Quits

Mel Gibson and Russian singer Oksana Grigorieva‘s whirlwind romance, which produced an offspring, has ended, reports. According to a source cited by the celebrity news Web site, Gibson and 39-year-old Grigorieva remain friends and have agreed to raise their five-month old daughter Lucia together.

“They just drifted apart,” the source, a close friend of the couple, said. The 50-year-old actor made his relationship with Grigorieva public not long after his wife Robyn Moore filed for divorce on April 13, 2009. Gibson had been separated from his wife for three years prior to their divorce. Gibson and Moore have seven children, while Grigorieva has a teenage son from former boyfriend Timothy Dalton.

Gibson, who broke an eight-year acting hiatus with January’s “Edge of Darkness,” is currently filming “How I Spent My Summer Vacation” and will appear in “The Beaver,” which is set for a 2011 release. Grigorieva, an accomplished pianist and model, is set to perform in a benefit concert in Russia next week.