In an exclusive interview with Closer Weekly, comedian Howie Mandel is opening up for the first time since learning he'll be a grandfather — and the America's Got Talent judge is so elated, he even spilled the sex of his daughter's baby!

“She’s having a girl!” Howie, exclusively reveals in the new issue of Closer, of his eldest daughter Jackie's impending bundle of joy, adding that she is “doing great!”

With only three months to go before the big day, he and wife Terry have everything ready for their granddaughter.

howie mandel

Howie with eldest child Jackie

“My wife and I have been shopping every day, and if we see clothes or little hats, we’ll buy them,” Howie tells the mag. “There’s a full closet and not even a baby yet!”

And though Howie says he “can’t wait to be a grandfather,” the news still seems surreal to him.

“It’s pretty interesting how life just keeps unfolding in front of my eyes,” he tells Closer. “My baby is having a baby — that’s so bizarre, so weird and yet so wonderful!”

For more with Howie, including his secret to 34 years of marriage with childhood sweetheart Terry, pick up the new issue of Closer Weekly, on newsstands now!