Slash took to Instagram on Monday, June 23, to wish a happy 21st birthday to his son, Cash Hudson, sharing a throwback image ...

Millie Bobby Brown celebrated her 21st birthday with a bold new look. The Stranger Things actress recently dyed her hair blonde, sparking speculation that she might portray Britney Spears in the ...

“Happy Birthday @landonasherbarker . You blessed my world 21 years ago and I am forever grateful. So proud of the man you’ve become and everything you’ve set out to accomplish and did.

"Happy 21st birthday to my beautiful Sami girl," Denise wrote in the caption of the post. "You were on the cover of People when you were born and here you are at 21 with a show about our family.

William and Kate also reposted the royal family’s birthday message, adding: “Wishing Lady Louise a very Happy 21st Birthday”. Louise was born prematurely in November 2003, weighing just 4lb 9oz.