Duff made the announcement on her first wedding anniversary. The 23 year-old star married ice hockey player, Mike Comrie last year in California.
Posting on her website Hilary Duff said “I can’t believe it has already been a year, time really flies when you’re having fun”!
“We also want to share the exciting news that… BABY MAKES THREE!!! We are extremely happy and ready to start this new chapter of our lives.”
Only last week Duff insisted that the couple wanted to wait a little while before trying for a baby.
“I think it was important to us that we had a year to just do whatever. And maybe longer than that because we enjoy having so much freedom. But we’re thinking about it,” she said.
Obviously nature has taken its course rather quicker than expected.
Hilary Duff is due to start filming the remake of Bonnie and Clyde, so she will have to get a wriggle on with that before things get too obvious.
Even Hollywood is unlikely to rewrite history and have a heavily pregnant Bonnie Parker getting gunned down in end.