Haylie Duff has given birth to her first daughter, and called her Ryan Credit: Paul Archuleta/FilmMagic

Haylie Duff's a mommy! Hilary Duff's older sister has given birth to her first child with fiance Matt Rosenberg!

PHOTOS: Celebrity siblings

The Real Girl's Kitchen host welcomed a baby girl into the world on Monday, May 11, and named her Ryana rep for the star confirms to Us Weekly. "Haylie Duff and fiancé Matt Rosenberg welcomed their first child, a baby girl, on Monday, May 11, in Los Angeles, Calif.," Duff's rep added in a statement. "Both mom and baby are doing great! Haylie and Matt are thrilled to finally meet their baby girl and become a family of three."

Although the little girl is Haylie's first child, the 30-year-old lifestyle blogger and TV host has had plenty of practice, hanging out with little sister Hilary's son Luca (Luca's dad is Hilary's estranged husband Mike Comrie).

And Hilary, 27, is evidently delighted about becoming an auntie to little Ryan. On Saturday, March 7, the excited former Disney star hosted a star-studded baby shower for Haylie, with a guest list that included Lauren Conrad, Kaley Cuoco, Jenna Dewan Tatum, and Ali Fedotowsky.

Little Ryan arrived later than expected, with Haylie reportedly going into the hospital over the weekend to be induced. On Tuesday, April 7, the mom-to-be and fiance Rosenberg shared an adorable snap of the pair of them cradling her pregnancy bump, with the caption "30 day countdown." In the end, their baby daughter arrived 34 days later.

Now that baby Ryan's here, new mom Haylie will be able to return to thoughts of getting married. The Napoleon Dynamite actress told Us Weekly back in December that wedding plans had taken a back seat amidst baby preparation, but both she and Rosenberg were excited to have an extra special guest at their wedding when it finally happened.

"It was kind of too much to all do at once," Haylie told Us of arranging a wedding while pregnant. "We're just trying to focus on one thing first, and then we'll do it," she said.

"It's pretty cool to think now our daughter is going to be at our wedding," proud dad-to-be Rosenberg added.

E! was first to break the news.