Mel Gibson, Oksana Grigorieva

Have Mel Gibson and Oksana Grigorieva called it quits?

Sources tell People and US Magazine that the Oscar-winning actor-filmmaker and his girlfriend of one year have split.

Mel Gibson's girlfriend gives birth to baby girl

Gibson, 54, and Grigorieva, 40, welcomed daughter Lucia in October.

The two went public with their relationship last May after Gibson's wife of 30 years, Robyn, filed for divorce in April. Gibson and his estranged wife have seven children together.

Grigorieva, a musician, also has a son with ex-boyfriend, actor Timothy Dalton.