The "Saturday Night Live" alum and "30 Rock" creator/star announced during an interview with Oprah on Wednesday that she is five months pregnant with her second child.

Fey is currently promoting her new book, "Bossypants," which is in bookstores now. In the book, Tina agonizes about whether or not to have a second child.

"I debate the second-baby issue when I can't sleep," she writes. "'Should I? No. I want to. I can't. I must. Of course not. I should try immediately.' I get up to go to the bathroom and study myself in the mirror. Do I look like someone who should be pregnant? I look good for 40, but I have the quaggy jawline and hollow cheeks of a mom, not a pregnant lady. It's now or never. This decision can't be delayed."

Tina has a 5-year-old daughter, Alice, with husband Jeff Richmond.