This is it.

Allison Williams ’10, the former Just Add Water superstar and KurtHugoSchneider starlet, has just landed a lead role in an unnamed HBO pilot comedy executive produced by Judd Apatow that follows three friends through their trials and triumphs, Deadline reports.

Williams will play Marnie, a “sexy, bitchy and ambitious assistant at a slick political PR firm whose goal is to practice environmental law” — a big step up, the we believe, from a hot TA and Ke$ha.

Williams will star alongside Jemima Kirke and Lena Dunham, who starred together in Dunham’s award-winning feature “Tiny Furniture.”

Watch Williams’ latest YouTube turn below: