The birthday girl got glam for her big night with the help of some gold eye masks.
Milania stunned at her party, wearing a one shoulder, floor-length sparkling green gown, accessorized with silver heels and dangly sparkling earrings.
The teen went for a beauty look which included a side-swept wavy hairstyle, a smokey eye, shimmering brown skin and soft pink lip.
The organic balloon display, created by The Balloon Boss, made for the perfect photo backdrop.
Treemendous Florist Events helped decorate the party with colorful flowers that coordinated with Milania's peacock theme.
Guests were welcomed to the party by a living wall that read "Milania's Sweet 16" from Treemendous Florist Events.
Milania received a stunning geode marble birthday cake. Created by Lisa Mansour, the co-owner of NY Cake Café, the artful dessert featured a marble textured fondant with blue and green crystals and gold leaf details.
Milania was joined at the part by her sisters Gia, 21, Gabriella, 18 and Audriana, 13, as well as their mom, Teresa Giudice, and the RHONJ star's new fiancé, Luis Ruelas.
Milania's milestone birthday comes one month after her big sister Gia celebrated turning 21.