Hilary Duff and Mike Comrie
08/15/2011 AT 10:15 AM EDT
is feeling the love from fans after revealing on Sunday that she and husband Mike Comrie are expecting their first child.
"Wow! I am just overwhelmed by all of the wonderful messages everyone is sending! Thank you so much! Big hugs! Xxo," the singer-actress, 23, Tweeted on Sunday evening
The pregnancy announcement came on the couple's first anniversary.
With so much to celebrate, it's no wonder they were all smiles
during a shopping trip in Malibu on Saturday. – Tim Nudd