But that's not Tina's only big news! She is also pregnant with her second baby.
Watch Tina's announcement
Tina devoted a chapter of Bossypants to her dilemma over whether to try to have another child. "You get to 40 and you think, 'Do I really want to do it, or is it because I'm running out of time?' Also, I thought 30 Rock would be canceled by now and I'd have time to do it," she says. "My husband and I decided that, rather than risk having the show end and in several years and feeling like part of our family was missing, that we were going to prioritize a family."