Citing irreconcilable differences, the 31-year-old actress asked for primary custody of their two-year-old daughter, Beatrix Carlin Sweetin-Coyle, with visitation rights for Morty Coyle on alternate weekends.
Sweetin, who has struggled with drug addiction in the past, also asked for the couple's 2000 Toyota Avalon.
According to E! News, Sweetin also had a daughter, Zoie, with her second husband, Cody Herpin.
"She seems in good spirits," a source told Us Weekly of the split. "She's sober still so she's in way better shape than last time. It's definitely true. I guess it's not working out."