LOS ANGELES — Brad Pitt is asking a judge to grant him joint custody of his six children in his split from Angelina Jolie Pitt, according to a divorce filing Friday.

The actor’s request was included in his response to Jolie Pitt’s Sept. 20 petition to end their two-year marriage. The actress sought sole physical custody of their six children, who range in age from 8 to 15.

Custody has been the major issue in the breakup so far, with authorities investigating Pitt over what happened during a dispute on a private flight with his family in mid-September. The couple reached a temporary custody agreement that allowed the actor to visit his children while the investigation by a child welfare agency in Los Angeles is ongoing.

The outcome of the investigation could impact how a judge determines custody arrangements, although courts in California generally favor awarding joint custody. The actors could also reach a private agreement that would not involve a public custody fight in court.

Pitt’s filing does not include any new details about the couple’s breakup. Pitt cited irreconcilable differences and makes no mention of a prenuptial agreement that will govern how the pair divides their assets. He also cites Sept. 15 as the day of their separation, one day after the alleged plane altercation between Pitt and his 15-year-old son, Maddox.

Pitt was accused of being abusive toward the teenager, source said, but authorities were not notified when the plane landed in Minnesota. Several sources said the incident was being investigated by the Los Angeles County Department of Children and Family Services, but the agency said it could not confirm that.

The actors were together for 12 years.

– From news service reports