America’s Got Talent winner Grace VanderWaal offered a glimpse at a shimmering ensemble she donned to celebrate her 21st birthday Jan. 15.

Kathy Hilton's daughter shared exactly where her moment-making Julien Macdonald dress is today.

Millie Bobby Brown rang in her 21st birthday mermaid style with fishtail braids in her new platinum blond hair and a sequined dress.

Paris Hilton put a new spin on her iconic chainmail 21st birthday dress more than two decades later, and didn't appear to have aged a day.

Olivia Rodrigo turned 21 on Feb. 20 and celebrated her last “underage drink” in style, donning a black minidress that showed off her thong.

Paris Hilton looked gorgeous when she channeled her 21st birthday sparkly dress at the opening of her pop-up in LA.

Young lady sparks reactions online after marking her 21st birthday wearing a rope tied around her body as an outfit in viral ...

Fittingly, she followed the early-aughts theme by re-creating the slinky chainmail dress and matching choker she wore for her 21st birthday back in 2002.

While she already has big plans for London’s 21st birthday wardrobe, Hilton currently enjoys dressing her little one in adorable pajamas, headbands and more.

The pop star celebrated her 21st birthday in style, with a halter-style LBD and sparkling silver jewelry.

Paris Hilton leaned into the nostalgia factor last night, recreating one of her most famous outfits of all time—the silver chainmail dress she wore for her 16th birthday—for her House of Y2K ...

Paris Hilton's has some new surprising details about her "iconic" 21st birthday dress. Get the details here.