Kevin Costner is celebrating the birth of his seventh child.

The 'Company Men' actor - who has three children with ex-wife Cinday Silva and a son produced after a brief relationship with heiress Bridget Rooney - and current spouse Christine Baumgartner welcomed daughter Grace Avery into the world yesterday (02.06.10).

The baby - the couple's third child together - weighed 7lbs 11oz.

A spokesperson for the 55-year-old actor and his 36-year-old wife said: "Both mother and daughter are doing well."

Grace is the seventh addition to the Costner family, joining brothers Cayden Wyatt, three, and 16-month old Hayes Logan and half-siblings Annie, 25, Lily, 23, Joe, 22 and 13-year-old Liam.

The Oscar-winning actor - who married German model Christine in 2004 after they had dated for four years - first announced he and his wife would be having a baby in March.

He has previously revealed despite having won the Best Picture and Best Director Oscars for his 1990 film 'Dances With Wolves', fatherhood is his proudest achievement.

He said: "Fatherhood is a huge challenge. But it's the one thing I am really, really proud of."