Nothing funny about this news.
The couple, who wed in 2003, have two sons together, Archie, 3, and Abel, 2.
The Parks and Recreation star and the Arrested Development alum have collaborated on several projects together, including Blades of Glory, Monsters vs. Aliens and Horton Hears a Who!. In 2010, Arnett made a guest appearance on Poehler's hit NBC comedy. Arnett currently stars on NBC's Up All Night.
This was Arnett's second marriage—he was divorced from Penelope Ann Miller after one year of marriage in 1995—and Poehler's first.
The couple's split was first reported by Us Weekly.