Kristen Stewart's estranged parents are ending their marriage after 27 years.

The Twilight star's mom, screenwriter Jules Mann-Steward, filed legal documents in Los Angeles two weeks ago, citing irreconcilable differences as the reason for the couple's split.

K-Stew's parents were legally separated on June 15, 2010, according to TMZ.com.

Kristen went through her own split just six weeks ago, when she admitted to cheating on boyfriend Robert Pattinson, whom she had been dating for three years.

She confessed to the "indescretion" after being spotted getting close with her Snow White and the Huntsman director Rupert Sanders.