Holy rugrats, Batman: apparently the rumors about Angelina Jolie having not one but TWO buns in the oven are correct. Are the celebs drinking from the same twin-producing water cooler these days?

While promoting their awesomely-titled movie, "Kung Fu Panda," costar Jack Black spilled the beans during a joint interview with Angelina, dropping the phrase, "when you have these [babies]."

Jolie was then asked by Today show's Natalie Morales if she is in fact having twins, and replied, "Yeah, yeah, we've confirmed that already. Well, Jack's just confirmed it actually."

At that point, everyone on earth rushed to find a good picture of Angelina Jolie's pregnant body, because twins? Really? Girlfriend still looks like she needs a STEAK.

The undoubtedly gorgeous specimens will be the 5th and 6th additions to the Jolie-Pitt clan, whose family currently includes Maddox, 6; Pax, 4; Zahara, 3; and Shiloh, who turns 2 this month. With two more bio-kids on the way, this balances the brood between adoptive and biological offspring, if anyone's counting.

Jolie demurred when asked about the babies' gender, saying they would like to keep that information private. That is, if Jack doesn't end up spilling the beans on that one, too. Something tells us he has a pretty sweet baby gift -- make that gifts -- coming to make up for that slip of the tongue!