Pitch Perfect writer Kay Cannon welcomed a baby girl over the weekend with her comedy writer husband Eben Russell -- see a picture Credit: Instagram

Kay Cannon is a new mom! The Pitch Perfect and New Girl writer welcomed a baby girl over the weekend with her comedy writer husband Eben Russell.

"I finally pooped out a baby!" the Emmy-nominated writer wrote via Instagram on Sunday, Oct. 13. "Evelyn Rose Russell. We call her Leni." Alongside the caption, the first-time mom shared a photo of her precious new bundle of joy sleeping peacefully wrapped in a white blanket.

Cannon -- also known for her work on the film Baby Mama and TV series 30 Rock -- has been documenting her growing baby bump throughout her pregnancy. "Trying to scare the baby out while watching 'Gravity.' Didn't work!" she joked just six days ago, sharing a photo of herself watching the Sandra Bullock and George Clooney film while wearing 3D glasses.

Cannon and Russell married in 2012 and is currently working on the script for the sequel of Pitch Perfect, Pitch Perfect 2. She was previously married to actor Jason Sudeikis for six years until their divorce in 2010.