Court records show Will Arnett has filed for divorce from Amy Poehler more than 18 months after the comedians announced their separation.

Arnett filed a divorce petition in Los Angeles Superior Court on April 8 citing irreconcilable differences. His filing seeks joint custody of the pair's two sons, who are ages three and five.

The actors announced they were separating in September 2012 after nine years of marriage.

They were married in 2003 and have maintained successful careers, with Poehler starring in NBC's Parks and Recreation and Arnett starring in CBS's series The Millers.

The court filing was first reported Wednesday by People magazine.