Tina Fey has some big news to talk about!

During a taping of The Oprah Winfrey Show Wednesday, Fey revealed that she's expecting her second child.

The 30 Rock star is five months along, her rep confirms to DIDNTINVITEME. Fey and her husband, composer Jeff Richmond, also have a 5 ½-year-old daughter, Alice.

Fey, 40, shared the news during an appearance to promote her new book, Bossypants, and an upcoming Saturday Night Live reunion. Oprah's chat with Fey is scheduled to air April 12.