Amy Adams and her fiancé Darran Legallo welcomed 7lb daughter Aviana Olea Legallo on Saturday in LA.
A spokesman told People: 'Mum and baby are home and doing great,' says Adams's rep. 'Everyone's healthy and happy.'
The Julie and Julia star also revealed she found out the sex of the baby soon after announcing her pregnancy in December.
She said: 'I thought about waiting and I just don't think that's really my personality.'
By Ruth Doherty