Aaron Paul and his wife are expecting a baby girl.

The 'Breaking Bad' actor and his spouse Lauren revealed in September they are expecting their first child and now she has revealed her ''bun'' will be a daughter.

Lauren shared a photo of some friends on Instagram, with a cut-out of Aaron in front and wrote: ''Nothing to say other than I love these humans and I'm missing Telluride. And I'm pleased to introduce you to Flat Aaron. When I travel without the babe, Flat Aaron always comes with and parties. Also, why are we all smiling the exact same way? It's kinda amazing. Also creepy.

''Alsooooo baby girl was in my tum here and I had no idea. BUN! (sic)''

The 38-year-old actor announced Lauren's pregnancy on Instagram by sharing a photo of her growing bump.

He wrote at the time: ''Hey everyone. Look what I did. Words can't express how excited I am that this little one has entered our lives. Just thought it was time I would share this beautiful news with all of you.''

Meanwhile, Aaron previously revealed he considers being at home to be like a vacation and gushed about he and his wife's mutual appreciation of music, which helped bring them together.

He shared: ''Any chance I have to be at my house, I take it. I'm never at home, I'm always travelling. I never work in Los Angeles. Being at home really is a vacation for me and my wife.

''Music is our obsession. I fell in love with my wife at a music festival. We have concerts inside our living room. Whenever we're in town, we track down artists playing in Los Angeles and just reach out to their tour manager and see if they'd like to play our living room.''