Will Arnett

Get ready to say goodbye to Up All Night.

Will Arnett has been cast as the lead in CBS' unauthorized Greg Garcia comedy, TVGuide.com has learned.

Get the latest pilot season scoop

In the pilot, the Arrested Development star will play Jack, a recently divorced guy whose life gets more complicated when his parents have marital problems of their own. Raising Hope's Garcia will write and executive-produce.

So what does this mean for the troubled Up All Night? NBC declined to comment on what Arnett's casting means for the fate of the series — the Garcia project is in second position to Up All Night — though reports say the network is considering scrapping it in the wake of star Christina Applegate's departure and news that Maya Rudolph is pregnant.