List of Famous people who are 31

Tomas Northug is a Norwegian cross-country skier. He was born in Mosvik, and is the middle brother of Petter Northug and Even Northug.

Aderlan de Lima Silva, simply known as Aderlan, is a Brazilian professional footballer who plays as a right back for Bragantino.

Anna Eira Margarida Heiskari, known professionally as simply Anna Abreu, is a Finnish singer and songwriter. Abreu first rose to fame in Finland after placing as the runner-up in the third series of the Finnish singing talent show Idols in 2007. Her music has been described as pop with influences from genres such as R&B, dance, and Latin. Since her participation in Idols, Abreu has become one of the best-selling former Idols contestants in Finland, and one of the most successful Finnish female singers. She has certified record sales surpassing 190,000 copies, which places her also among the 100 best-selling music artists of all time in Finland.

Tomoki Takata is a Japanese professional baseball second baseman for the Fukuoka SoftBank Hawks in Japan's Nippon Professional Baseball.

Miguel Ángel Guerrero Martín is a Spanish professional footballer who plays for Rayo Vallecano as a forward.

Camille Grassineau is a French rugby union player. She represented France at the 2014 Women's Rugby World Cup. She was a member of the squad that won their fourth Six Nations title in 2014.

Amaro Manuel Raposo Antunes is a Portuguese cyclist, who currently rides for UCI Continental team W52–FC Porto. In May 2019, he was named in the startlist for the 2019 Giro d'Italia.