Jessica Simpson is 'ecstatic' following the birth of her son on Sunday (30.06.13).
The 'Fashion Star' mentor, who also has a daughter Maxwell, 14 months, with her fiancé Eric Johnson, is 'so happy' to have finally welcomed her son, Ace Knute, into the world.
A source close to the singer turned fashion designer, 32, told UsMagazine.com that the couple 'are so happy to have a boy. One of each, everybody wants that.
'The baby is beautiful. He has Eric's little chin dimple!'
Jessica's daughter Maxwell is also very excited to be a big sister.
The friend explained: 'Maxwell is excited. She doesn't totally get it and understand, but she is very excited to have a brother.'
Jessica has had plenty of visitors in hospital since the birth, including her parents Tina and Joe, sister Ashlee, 28, and pregnant best friend Cacee Cobb.
Joe also tweeted: 'Very blessed to celebrate the birth of my new grandson.'
Jessica, who was previously married to Nick Lachey, gave birth via a scheduled C-section in Los Angeles.
The blonde beauty is expected to resume her position as a Weight Watchers spokesperson later this summer.
