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UsMagazine, Tuesday, April 12, 2011, 7:45am (PDT)

Liz Lemon's got a not-so-little bump in a little black dress!

A beaming Tina Fey debuted her pregnancy curves while exiting the New York studios of "The Late Show With David Letterman" on Monday night.

During a taping of "The Oprah Winfrey Show" last Wednesday, the "30 Rock" star, 40, announced that she's expecting her second child with composer hubby Jeff Richmond.

The baby-to-be (due in late summer) will join big sister Alice, 5.

"I thought that raising an only child would be the norm in Manhattan, but my daughter is the only child in her class without a sibling," Fey wrote about having another little one in her memoir, "Bossypants." "Most kids have at least two."

"Who will be my daughter's family when my husband and I are dead from stress-induced cankers?" she said. "She must have a sibling."


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