List of Famous people who are 31

Ng On-yee BBS MH is a Hong Kong snooker player who has won three IBSF World Snooker Championships and three World Women's Snooker world championships. She held the number one position in the World Women's Snooker world ranking list from February 2018 to April 2019.

Joris Delle is a French footballer who most recently played as a goalkeeper for Orlando Pirates in South Africa. He is a French youth international and has served as the number one goalkeeper at under-16, under-17, and under-21 level. Delle was a member of the 2005–06 Metz under-16 team that won the Championnat National des 16 ans.

Yoann Court is a French professional footballer who plays as a left winger for Ligue 2 club Stade Malherbe Caen. He has been capped at France U20 level.

William Matheus da Silva, known as William Matheus, is a Brazilian footballer who plays for Coritiba. Mainly a left back, he can also play as a centre back.

Alexander Calvert is a Canadian actor, best known for playing the role of Jack on CW's Supernatural

Luka Stepančić is a Croatian professional handball player for SC Pick Szeged and the Croatian national team.

Silje Solberg-Østhassel is a Norwegian handball player for Győri Audi ETO KC and the Norwegian national team.

Pedro Tanausú Domínguez Placeres, commonly known as Tana, is a Spanish professional footballer who plays as a winger or forward for Albacete Balompié.

Laura Chantal Dijkema is a Dutch volleyball player, who plays as a setter. She is a member of the Women's National Team. She plays for Lokomotiv Kaliningrad.

Johannes Lochner is a German bobsledder who competed at the 2018 Winter Olympics.