Hilary Duff threw a get-together in honor of Haylie Duff and fiancé Matt Rosenberg preparing to welcome their second child, a little girl


What’s the sign of a great party, according to Haylie Duff? Having such a good time that you forget to document it on camera!

That proved to be the case on Saturday night when Hilary Duff threw a get-together in honor of sister Haylie and fiancé Matt Rosenberg, who are preparing to welcome their second child, a little girl to join 3-year-old sister Ryan Ava Erhard.

“Last night my sister threw me the sweetest celebratory dinner for our new baby girl!” the Real Girl’s Kitchen food blogger, 33, captioned a snap of a flower arrangement on the table next to her and Hilary’s place settings. “AND I hardly took any photos. A good sign of a great evening! Thank you @hilaryduff 💜”

However, she did squeeze in one selfie with her younger sister, who is mom to 6-year-old son Luca.

“Remembered to take this one! 😊💜” she wrote on Instagram, sharing a photo of the siblings smiling side-by-side.

Hilary, 30, is no stranger to party planning. She and mom Susan hosted Haylie’s first baby shower back in March 2015, an outdoor bash with a guest list that included Jenna Dewan-Tatum, Lauren Conrad, Lacey Chabert and Kaley Cuoco.

Want all the latest pregnancy and birth announcements, plus celebrity mom blogs? Click here to get those and more in the PEOPLE Babies newsletter.

RELATED VIDEO: Hilary Duff’s 5-Year-Old Son Luca Blows Kiss While Water Tubing

Haylie announced her pregnancy in January with a cute photo of Ryan pointing at her own belly, but the parents-to-be discovered they would be welcoming a new addition back in the fall of 2017.

“When I found out I was pregnant, it was not an Instagram-worthy moment by any means,” Haylie recently told PEOPLE. “We decided we were gonna try and it was kind of fast after that. I think Matt thought he had a little more time to mentally prepare.”

PEOPLE soon confirmed that baby no. 2 was another girl.

“Ryan is thrilled!! She really wanted a baby sister,” a source told PEOPLE. “The whole family is so excited for the new baby to arrive.”

Haylie later admitted that it was a dream come true.

“Truthfully, we really wanted another girl. My sister and I have such a special relationship. Ryan could have that bond of sisters,” Haylie shared with PEOPLE. “We would have been happy if it was a boy, but we’re pretty pumped that it’s a girl.”