Rihanna and A$AP Rocky Book Out Entire NYC Slime Museum for Son RZA's Fourth Birthday

NEW YORK - Rihanna and A$AP Rocky pulled out all the stops for their eldest son's fourth birthday last week, privately reserving the Sloomoo Institute - a popular interactive slime attraction in Manhattan's SoHo neighborhood - an exclusive family celebration on May 13.

The Grammy-winning singer and the Harlem rapper were joined by all three of their children - RZA, Riot, and infant Rocki - along with a tight circle of relatives and friends. According to a source cited by Page Six, the gathering was deliberately low-key: no celebrity guests, just family. The couple reportedly reserved the entire venue for the evening.

The space was transformed for the occasion, decked out with elaborate balloon displays and activity stations tailored for young children. Guests were treated to the venue's signature Sloomoo Falls attraction, hands-on slime labs, and a series of interactive play zones. The source described the event as "the most epic" celebration, noting that the children spent time exploring slime vats and crafting custom blends at a dedicated DIY bar.

The night's highlight came when Rihanna stepped beneath the museum's iconic slime waterfall alongside the children, drawing cheers from the crowd. Video clips and photos from the party circulated widely on social media, including footage of guests singing "Happy Birthday" as a towering, number four-themed cake was brought out.

The parents arrived dressed with their signature ease. Rihanna wore an oversized white T-shirt layered beneath a tan jacket, paired with loose cargo pants, ballet flats, oversized sunglasses, and a brown handbag. Rocky complemented her with a camel trench coat over a gray T-shirt, black jeans, and combat boots.

The celebration marks something of a tradition for the family: last year, they similarly rented out a color-themed New York museum for RZA's third birthday.

Rihanna and Rocky, who have been in a relationship since 2020, are parents to three children. RZA was born in 2022, followed by Riot in 2023. Their youngest, Rocki, arrived in 2025 - a pregnancy Rihanna revealed dramatically on the Met Gala red carpet.