Sean Penn and Robin Wright Penn in 2007
12/28/2007 at 04:00 PM EST
Divorce papers have been filed in Sean Penn and Robin Wright Penn's separation – with the actor and actress both filing papers on separate occasions.
Sean Penn initially filed for divorce from his wife in Marin County, Calif., Superior Court on Dec. 7 – but the petition was later dismissed. No exact reason was given for the case being disposed before trial.
Three days after that, Robin Wright Penn filed her own paperwork.
Penn's divorce papers list Nov. 30 as the date of their separation. Wright's petition, filed Dec. 21, say they separated Dec. 1. Both list "irreconcilable differences" as the reason and ask for joint legal and physical custody of their two teenagers, Hopper Jack, 14, and Dylan Frances, 16.
The couple are scheduled to have a hearing on the case April 21.
A rep for the couple first confirmed their plans to divorce
to PEOPLE on
Penn and Wright were married in April 1996.