Summer, whose siblings include actors Joaquin Phoenix and the late River Phoenix, told the court she was seeking spousal support in addition to joint physical and legal custody of their two sons, 13-year-old in and nine-year-old Atticus.
Affleck and Phoenix wedded in 2006 in the wake of getting to be noticeably occupied with 2003.
Summer, 38, cited "irreconcilable differences" in her split from the 41-year-old, the reigning Academy Award-winner for best actor after his lauded performance in Manchester By the Sea, E! reports. They share two children together, IN and Atticus.
Casey and Summer were introduced to each other by the latter's brother in the mid-1990s.
Both Affleck and Phoenix are from star-studded families. In the docs, she requests joint physical and legal custody of the boys. The two separated after more than 13 years together. She is also seeking spousal support. "They remain very close friends", Casey's rep told People at the time.
Affleck has been dating actress Floriana Lima (Supergirl) since 2016.
It shows up the combine were not ready to work things out and Phoenix refered to "beyond reconciliation contrasts" in her separation recording.