According to photographs of the former Lost star, where Lilly was pictured showing off her post-baby body, she has welcomed a new addition to her brood.
The Hobbit beauty, who has yet to comment on the birth reports, already has a four-year-old son Kahekili with her boyfriend Normal Kali.
Back in June, the actress appeared at the Los Angeles premiere of her film Ant Man sporting a large baby bump, confirming to reporters that she was seven months pregnant.
At that time, the actress said she had no idea if she and her boyfriend were expecting a boy or a girl, and as she has yet to comment on the rumours, we are none the wiser as to what little tot has joined the family.
Evangeline previously spoke to Ocean Drive about how motherhood had given her a firm sense of what’s important.
"Becoming a mother has really helped me put my feet on the ground and given me a very powerful sense of self and a powerful sense of priority in life," she said.
"All I have to do is see my son to do that mental check that says, 'Is this really important? Do you really need to be doing this? Do you really care?' It helps put everything in perspective when things get stressful or when there's a demand or pressure on me. At the end of the day, it's our family, it's being a mother and a partner and seeing love all around."