Demi Lovato & Britney Spears: 'X Factor' Judges!

Two former Disney starlets will reportedly be sitting at The X Factor‘s judging table this fall!

Yesterday, Demi Lovato, 19, signed on as the series fourth and final judge, sources confirm to E! News.

PHOTOS: Check out the latest pics of Demi Lovato

Demi will be joined by Britney Spears, who finalized her deal last week.

Today, both Demi and Brit are expected to be in New York City for the Fox Up Fronts where a formal announcement about the duo joining the show will be made.

X Factor returns this September.