Hilary Duff and Mike Comrie
08/14/2011 at 03:00 PM EDT
Happy anniversary ... and congratulations!
and husband Mike Comrie, 30, who are celebrating their first wedding anniversary this weekend, are expecting their first child, the singer-actress announced on her official website
In the post
, Duff, 23, reflected on her marriage– she and Comrie wed on Aug. 14, 2010
– and then made her big announcement.
"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."