List of Famous people who are 40

David Darnell Brown, best known by his stage name Young Buck, is an American rapper. As a music executive, he heads his own record label, Cashville Records, and is a former member of the hip hop groups G-Unit but continues to be tied to a legally binding contract that prevents him from releasing new music.

Carlos Esteban Frontini, or simply Frontini, is an Argentine former footballer, who plays as a striker. Frontini also has Brazilian nationality.

Antal Zalai is a Hungarian concert violinist.

Ume Aoki is a Japanese manga artist, illustrator and dōjin artist from Hyōgo Prefecture. She officially romanizes her name as aokiume. She illustrates under the pennames apricot+ for many of her dōjinshi, and Apply Fujimiya for the visual novel Sanarara.

Juan Carlos Rojas Villegas is a Costa Rican cyclist, who is currently suspended from the sport following a positive drugs test at the 2017 Vuelta Ciclista a Costa Rica. He won the 2013–14 UCI America Tour.

Hedvig Bjelkevik is a Norwegian speed skater. She was born in Arendal and is the sister of Annette Bjelkevik. She competed in the 1,500 metres and team pursuit at the 2006 Winter Olympics in Turin.

Jonás Trueba is a Spanish filmmaker.