LOS ANGELES (Reuters) – Actress Katie Holmes has filed for divorce from her superstar husband Tom Cruise, ending a six-year marriage that produced one daughter and captivated celebrity watchers worldwide. Holmes filed papers in New York City on Thursday, citing irreconcilable differences and seeking sole custody of the couple’s six-year-old daughter Suri in a move that came “out of the blue” for the “Mission: Impossible” actor, said one source with knowledge of the situation.