Already mom to son Mason, 2, Kourtney Kardashian is overjoyed to be expecting a baby girl with boyfriend Scott Disick this summer.

On tonight’s premiere of Keeping Up With the Kardashians, the second-time mom-to-be, 33, can hardly hold in her excitement when she and Disick, 28, decide to reveal their new arrival’s gender.

Make sure to tune in TONIGHT 8/9c on E!