Blanket Jackson is celebrating a milestone birthday.

The youngest son of Michael Jackson, who changed his name to Bigi in 2015, turned 18 on Friday — and his siblings Paris and Prince Michael Jackson marked the special day with tributes on social media and a sushi dinner.

“My little brother is a legal adult today. what the f—,” Paris, 21, captioned three throwback photos with her younger sibling. “I used to change his diapers. this is such a trip.. proud of the handsome, intelligent, insightful, funny, and kind young man he has become. he likes privacy so that’s all i gotta say. hbd lil bro♥️.”