The 49 year old comedian, most loved for her role as Effie, announced the arrival of her daughter, Jamie Betsis on Facebook.
An overjoyed Coustas and her husband George Betsis posted: "We're so very happy to announce the arrival of our much anticipated baby girl Jamie Betsis. Baby & Mother are in exceptional health, father still doing cartwheels.”
Congratulations Mary and George, we are so happy for you!
Image courtesy of http://womansday.ninemsn.com.au/celebrityheadlines/8762802/mary-coustas-welcomes-her-first-child