The pregnant star glowed as she stepped out in New York for an awards ceremony, showing off her new curves in a stretch tulle gown by Michael Kors.
Blake, 27, announced that she and husband Ryan Reynolds were expecting their first baby together earlier this month. And at the event she told E! News that she feels she has "always been a mama".
"I came from a big family, a big family of Southerners," the Gossip Girl star said. "I feel like I've always been sorta… I'm the youngest of five, so I never raised any siblings below me, but I'm always the person who's taking everyone else's kid and putting them on my hip, so I've kinda always been a mama."
A fashion favourite, Blake will have the chance to showcase her maternity style over the coming months.
And at Thursday's event – the God's Love We Deliver, Golden Heart Awards – she shared her secret with US Weekly: "I'm going to amp up my style by wearing things that are stretchier, cause that's all that fits!" she joked.
Blake revealed she was pregnant earlier this month via her lifestyle website, Preserve. It is the first child for Blake and 37-year-old Ryan, who met on the 2010 set of The Green Lantern, and surprised friends, family and fans by marrying in September 2012 in a secret ceremony.