Jack Antonoff Has Moved On From Lena Dunham — 'As In He Is Seeing Someone Else'!

Jack Antonoff has allegedly already jumped into a new relationship.
As we previously reported, the Bleachers artist and Lena Dunham called it quits on their five year relationship back in December, as they "were growing apart." And it seems as though Taylor Swift's trusted producer didn't mourn his broken relationship for too long as he's reportedly found a new flame!
Related: Tessa Is NOT Apologizing To Lena!
*Sniff* An insider told Us Weekly:"The relationship is done and he has moved on &helli