Oksana Grigorieva and Mel Gibson End Relationship (PHOTOS)

the relationship has run its course mel and oksana split

Russian musician and singer Oksana Grigorieva was the other woman in the breakup of the 30 year marriage of Mel Gibson and his wife Robyn Gibson.  The pair began their relationship a year ago and have a 5-month-old daughter Lucia, who was born on October 30, 2009.  The romance has reportedly run its course and they have opted to split.

Gibson's publicist indicates that Mel and Oksana are both wrapped up in their careers and simply drifted apart.  Mel is currently in Mexico filming "How I Spent My Summer Vacation."  Grigorieva is preparing to put on a charity concert in Russia.

The 54-year-old actor has seven other children.  Oksana has a 12-year-old son Alexander with former boyfriend Timothy Dalton.

More photos below: