Lena Headey is not married to her brother in real life, but the Game of Thrones actress is filing for divorce from Peter Loughran.
In legal documents, the star cites "irreconcilable differences" as the basis for the couple's split. They got married in 2007 and have a two-year old son.
Headley was born in Bermuda and has appeared in such movies as The Brothers Grimm and 300. But she has now broken out as the evil Cersei Lannister on the aforementioned HBO smash.
Game of Thrones Season 3 premieres on March 31 and shooting is now underway.