List of Famous people who are 40

Daniel Ionel Oprița is a Romanian professional football manager and former football player.

Christopher Benstead is a British film composer, arranger and Academy-Award winning re-recording mixer. He has worked on several projects with director Guy Ritchie including composing the score for The Gentlemen, starring Matthew McConaughey and Michelle Dockery, and the action thriller Wrath of Man. He also arranged and composed additional music for Guy Ritchie's Aladdin alongside legendary songwriter and composer Alan Menken and produced and arranged the songs in the film, working with Will Smith to create re-imagined versions of the original's songs.

Carlos Iván Oyarzun Guíñez is a professional Chilean road cyclist, who currently rides for UCI Continental team BAI–Sicasal–Petro de Luanda. Oyarzun has also rode for UCI ProTeam Movistar Team.

Matthieu Jost is a French former competitive ice dancer. With Pernelle Carron, he is the 2007 Skate Canada International bronze medallist, 2007 Winter Universiade bronze medallist, and 2008 Karl Schäfer Memorial champion. They placed sixth at the 2009 European Championships and ninth at the 2009 World Championships.

Marek Ariel Schulman is an American actor, film director, and producer. He starred in, produced, and directed the 2010 documentary Catfish, and directed Paranormal Activity 3, Paranormal Activity 4, Nerve and Project Power with Henry Joost.