List of Famous people who are 31

Thaís de Souza Melchior Affonso is a Brazilian actress.

John Carlson is an American professional ice hockey defenseman and alternate captain for the Washington Capitals of the National Hockey League (NHL). He was drafted by the Capitals in the first round, 27th overall, in the 2008 NHL Entry Draft after playing a year in the United States Hockey League (USHL) with the Indiana Ice. Before reaching the NHL, Carlson played junior hockey in the Ontario Hockey League (OHL) with the London Knights and played professionally with the Capitals' American Hockey League (AHL) affiliate, the Hershey Bears. He also participated internationally for the United States in the 2010 World Juniors and 2014 Winter Olympics. Carlson won the Stanley Cup as a member of the Capitals in 2018, as the highest scoring defenseman during the playoffs.

James David O'Connor is an Australian professional rugby union footballer who currently plays for Queensland Reds in Super Rugby. He made his international debut for Australia in 2008 at the age of eighteen. He has played for the Western Force and Melbourne Rebels in Super Rugby. In 2013 he played for English Premiership side London Irish, and in the 2014–15 season he moved to France to play in the Top 14 competition for Toulon.

Alexandra Nicole Michael, is an American model.

Brett Jordan Dier is a Canadian actor. He is best known for his role as Michael Cordero Jr. on Jane the Virgin. He is also known for his recurring roles on the Canadian TV shows Bomb Girls and The L.A. Complex, and most recently for his main role as "C.B." on the ABC sitcom Schooled.

Alexandre Letellier is a French professional footballer who plays as a goalkeeper for Ligue 1 club Paris Saint-Germain.

Nadine Prohaska is an Austrian football midfielder, currently playing for SC Sand in the Frauen Bundesliga. She previously played for USC Landhaus and SV Neulengbach, and Bayern Munich in the German Bundesliga.

Mehmet Ekici is a Turkish footballer who most recently played as a midfielder for Fenerbahçe.

Gary Corcoran is a British welterweight boxer.

Thomas Pauck Rogne is a Norwegian professional footballer who plays for Polish club Lech Poznań as a defender. Rogne has also been capped for the Norway national team.