Former Girls Next Door star Holly brought adorable little Rainbow to the Animal Foundation's Forever Home Family Picnic in Las Vegas on Sunday afternoon (3 November).
How gorgeous is her little girl?!
33-year-old Holly joked on Twitter about their sweet matching attire: "Rainbow is camouflaged in our Mommy and me dresses."
The model and dancer gave birth to her first child, Rainbow Aurora, in March. Rainbow's dad is Holly's now-husband Pasquale Rotella.
Holly tied the knot with businessman Pasquale in an a-mazing sounding ceremony at Disneyland California on 10 September.
They exchanged vows in the evening after the park was closed for the day, with little Rainbow serving as their very special guest of honour.
The pair became "officially engaged" in June when Pasquale popped the question during a night out at a funfair in their Vegas hometown.
Holly recently told the Las Vegas Sun that she's loving life as a wife and mother – and is already looking forward to expanding their family.
"We definitely want to have more kids, we want to have a sibling for Rainbow. Hopefully they'll be about 2 1/2 years apart," she said. "That's a nice age; it will give me some time to work in between babies. I think it will be a nice balance."
Meanwhile, Holly's former Girls Next Door co-star Kendra Wilkinson has just announced that she is expecting her second child with husband Hank Baskett. They are already parents to three-year-old Hank Baskett Jr.