It may have only been two months since they appeared at the Academy Awards together, but the glow for Sean Penn and Robin Wright Penn has already ended.

Late last week, the Milk star filed for legal separation from his wife of 13 years. The moves comes approximately 16 months after Robin filed for divorce. Although he briefly dated model Petra Nemcova in 2008, Sean and Robin reunited several months later.

Penn, who listed “irreconcilable differences” as the cause, is seeking joint custody of their two kids: 18-year-old daughter Dylan and 15-year-old son Hopper Jack.