Hilary Duff's first wedding anniversary is extra sweet: she and MikeComrie announced they are expecting a baby!

PHOTOS: Find out which other stars are expecting

"This weekend, Mike and I are celebrating our one year anniversary! In memory of the special day, we decided to post some of our favorite pictures from our wedding!" she wrote on her official website Sunday.

PHOTOS: What celebs love most about motherhood

"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. Thanks to everyone for the continued love and support throughout the years!"

PHOTOS: See which other stars have romanced athletes

Duff, 23, wed pro hockey player Comrie, 30, on August 14, 2010 in an intimate sunset ceremony at a $29 million estate near the San Ysidro Ranch in Montecito, Calif.

"We both love kids and we're really excited," Duff told Us Weekly Wednesday at the Kendra Scott jewelry event in L.A., just days before sharing her pregnancy news with the world. "It was a big deal for us because we had a year to be married."