Anne Hathaway knows if she's having a boy or girl, but won't be telling anyone else.

The pregnant actress appeared on Jimmy Kimmel Live! on Monday night (10.08.26), where she was questioned about the tot's gender by guest host Anthony Anderson.

He said: "I consider myself to be a baby whisperer. Now, this is my first time seeing you pregnant and what not. It looks like it's a boy. Am I correct, or you're waiting?"

Anne gave a small smile as she replied: "We know [but] we're not saying."

The audience met the news with cheers, to which Anne admitted she always "feels bad" for not revealing the baby's sex when asked, adding: "Thank you for the support. It always feels so rude saying that," adding that she "feels bad" for not sharing the baby's sex when asked."

The tot will be the third child for Anne and husband Adam Shulman, who are already parents to Jonathan, 10, and Jack, 6 - with The Devil Wears Prada 2 star admitting her older kids are more than a little excited to be getting another sibling.

She grinned: "[They're] over the moon. It feels really beautiful. It feels like the family's having a baby. I mean, it'll feel like I'm having a baby while it's happening, but the emotional feeling is that we're all going to welcome this little one."

Anne has been showing off her baby bump on the red carpet in recent weeks, and kept the trend going as she wore a stomach-baring black top and matching trousers for the Jimmy Kimmel Live! appearance.

She previously opted for a cropped front flowing top and low-slung jeans for The End of Oak Street premiere on Sunday evening, and was forced to hit back at speculation that she was sporting a fake baby bump.

Sharing a snap of her outfit on Instagram, Anne wrote: "Fake hair, real bump. Enjoy The @endofoakstreet Block Party chaos with me as my outfit literally melts in the heat!!"

The End of Oak Street is due for release on Thursday (13.08.26), and marks a busy few months for Anne, who has also been promoting The Odyssey and upcoming Colleen Hoover adaptation Verity.