First-time mom Scarlett Johansson is learning that motherhood is full of surprises.

The actress has kept pretty quiet about her baby girl Rose, whom she welcomed with fiance Romain Dauriac back in September 2014. But Johansson got candid in W magazine’s March issue about how shocking it was when her daughter actually arrived.

“When she came out of me I was so surprised,” Johansson said. “I had a very strong picture in my mind of what my baby would look like, and, of course, she is completely different. Perfect, but not what I’d imagined.”

The “Lucy” star, who is an advocate of the No Kids Policy in Hollywood, has yet to share photos of her daughter — so it looks like we’ll be in for a surprise, too, when she makes the big reveal.

Check out some photos from Johansson’s shoot in W:

For more with Scarlett Johansson, pick up the March issue of W, on newsstands later this week.