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After nine years of marriage, Amy Poehler and Will Arnett are calling it quits.

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A rep for the couple comfirmed to ET that they are separating. A source tells Us Weekly, "It's very amicable."

Arnett and Poehler wed in 2003 and have two sons: Archie, 3, and Abel 2.

The two stars have played opposite each other in such projects as Arrested Development, Blades of Glory, Horton Hears a Who! and Monsters vs. Aliens.

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This marks Arnett's second marriage breakup, as he divorced Penelope Ann Miller in 1995 after being wed for one year.