updated 08/14/2011 AT 3:00 PM ET
•originally published 08/14/2011 AT 4:00 PM ET
Happy anniversary … and congratulations!
“We also want to share the exciting news that BABY MAKES THREE,” she wrote. “We are extremely happy and ready to start this new chapter of our lives.”
Earlier this year, rumors circulated that Duff was expecting.
“It’s just a rumor guys!” she Tweeted in January. “Not true. But thanks for all the good wishes! Lol.”