Haylie Duff is pregnant! Credit: Valerie Macon/Getty Images

Hilary Duff is going to be an aunt! The former Disney star's older sister Haylie Duff is pregnant and expecting her first child, a baby girl, with fiancé Matt Rosenberg, Haylie's rep confirms to Us Weekly.

 

The soon-to-be mom confirmed the pregnancy herself on Instagram and hinted she's having a girl, sharing a picture of tiny pink Jordan sneakers. "Happiest girl in the world! Finally can let everyone know that Matty @mr_sts and I are expecting! #BabysFirstJordans," she captioned the adorable kicks.

There's no doubt Haylie will make a great mom, after bonding with Hilary's son Luca. In an Instagram from Thanksgiving weekend, the chef shared a snap of herself baking with Hilary and Mike Comrie's son, with the caption: "Baking #Thanksgiving cookies with my favorite little man!"

Baking #Thanksgiving cookies with my favorite little man!

A photo posted by haylieduff (@haylieduff) on Nov 11, 2014 at 10:42am PST

Haylie and Rosenberg announced their engagement this past April on Instagram with a picture of themselves and her massive rock.

"This week has seriously just become the best week of my life!" Duff wrote on her Real Girl's Kitchen blog after announcing the news. "As if announcing The Real Girl's Kitchen tv show wasn't enough, Matt just took me by total surprise and proposed…on April Fool’s Day of all days! The moment was genuine and sweet (like him!) and I couldn’t wait to say yes! We are so excited and happy to share our wonderful news with everyone!" she continued. "We both feel so blessed to have the love and support of our family and friends and can’t wait to start this new adventure!"

Just last week they celebrated their anniversary in Hawaii. In a romantic snap, the soon-to-be parents smiled on the beach. Haylie captioned the pic: "Happy Anniversary to the greatest man I know. I'm lucky to be yours. @mr_sts."

E! News was first to report the story.

Happy Anniversary to the greatest man I know. I'm lucky to be yours. ???? @mr_sts

Una foto pubblicata da haylieduff (@haylieduff) in data: Nov 11, 2014 at 9:57 PST