Credit: Stephen Lovekin/Getty Images

30 Rock star, Tina Fey, 41, and her composer husband Jeff Richmond welcomed baby girl Penelope Athena into the world Wednesday, August 10 her rep confirms to Us Weekly.

Fey announced the news of her second pregnancy during a taping of The Oprah Winfrey Show.Penelope joins big sister Alice, 5.

(In her memoir, Bossypants, Fey wrote that she was "stricken with guilt" that Alice was an only child, and burst into tears at the gynecologist from stress.)

"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," the Saturday Night Live alum wrote. "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 joked. "She must have a sibling."