In the divorce papers, Ross requests joint custody of the children and spousal support, according to TMZ.
Sanders has also filed the divorce petition in which he is requesting joint custody.
Although Kristen and Robert have not declared anything official about a possible reconciliation since the scandal, they have been spotted together several times.
It was rumored that the 34-year-old actress wants to move back to the UK.
Below you have a brief interview with Liberty Ross at the Premiere of “Snow White and the Huntsman.”