List of Famous people who are 31

Peter Sagan is a Slovak professional road bicycle racer, who currently rides for UCI WorldTeam Bora–Hansgrohe. Sagan had a successful junior cyclo-cross and mountain bike racing career, winning the Junior Mountain Bike World Championship in 2008, before moving to road racing.

Skylar Kierra Diggins-Smith is an American professional basketball player for the Phoenix Mercury in the Women's National Basketball Association (WNBA). Diggins was drafted third overall by the Tulsa Shock in the 2013 WNBA draft. In high school, she was the National Gatorade Player of the Year, the Gatorade Female Athlete of the Year, and a McDonald's All-American. Diggins played point guard for Notre Dame, where she led Notre Dame to three consecutive Final Fours and two consecutive NCAA championship appearances. She finished her Notre Dame career ranked first in points and steals, second in assists, and as a two-time winner of the Nancy Lieberman Award as the top point guard in the nation.

Liu Xueyi is a Chinese actor.

Luis Jan Piers Advíncula Castrillón is a Peruvian professional footballer who plays for Rayo Vallecano and the Peru national team as a right-back.

Subaru Samuel Bartsch , known professionally as Subaru Kimura , is a German–Japanese actor, voice actor and singer. His best-known role is voicing Takeshi Goda in the Doraemon series, which has spawned numerous specials.

Marcell Ozuna Idelfonso, nicknamed "The Big Bear", is a Dominican professional baseball outfielder and designated hitter who is a free agent. He has played in Major League Baseball (MLB) for the Miami Marlins, St. Louis Cardinals, and Atlanta Braves. He made his MLB debut in 2013 with the Marlins.

Darío Ismael "Pipa" Benedetto is an Argentine professional footballer who plays as a striker for French club Marseille and the Argentina national team.

Ashley Thomas Cain is a former footballer who played for Midland Football League Premier Division side Coventry Sphinx, where he played as a winger.

Yasiel Puig Valdés, nicknamed The Wild Horse, is a Cuban-American professional baseball right fielder who is a free agent. He has played in Major League Baseball (MLB) for the Los Angeles Dodgers, Cincinnati Reds, and Cleveland Indians. His nickname is "The Wild Horse", given to him by former longtime Dodgers broadcaster Vin Scully. Puig is the all-time leader in postseason appearances for the Dodgers with 58.

Saurabh Sunil Tiwary is an Indian cricketer who plays as a left-handed middle order batsman. He was one of the key batsmen in the Indian team that won the 2008 U/19 Cricket World Cup in Malaysia.