List of Famous people who are 31

Mary Alexandra "Alex" Bruce is a Canadian badminton player from Toronto, Ontario. She competed at the 2012 Summer Olympics in the Women's doubles event with partner Michelle Li.

Fábio André Silvestre Tomas is a Portuguese former cyclist.

Yui Hashimoto is a Japanese badminton player who plays for NTT East badminton club.

Chloe Hosking is an Australian professional racing cyclist, who currently rides for UCI Women's WorldTeam Trek–Segafredo. Hosking has represented Australia at junior and then senior levels since 2007. Following success in a number of international events she turned professional in 2010. She competed at the 2012 Summer Olympics in the Women's road race, and won the women's road race at the 2018 Commonwealth Games.

Claudia Zornoza Sánchez is a Spanish football midfielder who plays for Levante UD of the Primera División and the Spain national team.

Gao Huan is a Chinese badminton player.

Sylvain Grosjean is a French badminton player. He has won numerous junior title in France, and in 2009 he attracted the international attention by winning the boys' doubles title at the European Junior Championships partnered with Sam Magee of Ireland. In 2011, he also won the men's doubles title at the Dutch International tournament with Baptiste Carême. In 2012, he decided to retire from the French Badminton Association (INSEP), and focused on his studies in physiotherapy.