The actress, who's currently expecting her second child with husband Ryan Reynolds, looked stunning in a Carolina Herrera dress at the premiere of her movie The Shallows on Tuesday in New York City.
Lively flew solo to the premiere while Reynolds stayed home to babysit their 18-month-old daughter James.
"He's a good papa," Lively told E! News' Marc Malkin.
Speaking of Reynolds, Lively recently made headlines for saying her and her husband were "officially breeders," but the actress told E! News that she was just joking.
She dished, "Anything you say people are going to sensationalize it but yeah I made a joke. I come from five kids, he comes from four kids, I said we have a website in which you can pick your breed and in eight weeks you'll have...I don't know…I speak nonsense."