List of Famous people who are 40

Julie-Marie Parmentier is a French actress.

Maxim Znak is a Belarusian lawyer and politician, part of Viktar Babaryka's team, lawyer of Sviatlana Tsikhanouskaya, and a member of the presidium of the Coordination Council formed during the 2020–21 Belarusian protests in opposition to the rule of Alexander Lukashenko. Along with fellow opposition leader Maria Kolesnikova, Znak actively participated in the demonstrations and protests against the Lukashenko government after Sviatlana Tsikhanouskaya had left the country. He was sentenced to 10 years in prison by the Belarusian authorities.

Norbert Feher, also known as "Igor the Russian", "Igor Vaclavic" and "Ezequiel", is a Serbian criminal of Hungarian ethnicity. He is credited with various crimes of murder and robbery in Italy and Spain. He is currently in the latter serving his sentence after being captured after his last crime in Andorra, Teruel, Spain.

Ayako Valentina Hamada Villarreal is a Mexican professional wrestler. During her 20-year career, Hamada wrestled for various promotions, including All Japan Women's Pro-Wrestling, Gaea Japan and Pro Wrestling Wave in Japan, Consejo Mundial de Lucha Libre (CMLL) and Lucha Libre AAA Worldwide in Mexico and Shimmer Women Athletes and Total Nonstop Action Wrestling (TNA) in the United States. She is the daughter of Gran Hamada and the younger sister of Xóchitl Hamada.

Peter Osaze Odemwingie is a retired Nigerian professional footballer who played as a forward and winger.

Christian Sugiono is an Indonesian actor and model of mixed German, Chinese and Javanese descent.

Franziska Christine "Fränzi" Aufdenblatten is a retired Swiss World Cup alpine ski racer.

Fabiana de Almeida Murer is a retired Brazilian pole vaulter. She holds the South American record in the event with an indoor best of 4.82 m and an outdoor best of 4.87 m, making her the fourth highest vaulter ever at the time, now the eighth. She won the gold medal at the 2011 World Championships in Athletics, at the 2010 IAAF World Indoor Championships and also won at the 2007 Pan American Games. Murer represented Brazil at the 2008, 2012 and 2016 Summer Olympics. She is a four-time South American Champion with wins in 2006, 2007, 2009 and 2011. Murer was coached by both the Ukrainian Vitaly Petrov, who managed the world record holders Sergei Bubka and Yelena Isinbayeva, and her husband, Élson Miranda de Souza, a former vaulter himself.

Marta Fernández Farrés is a retired Spanish women's basketball player. A 1.80 m (5'11") guard, she won three bronze medals with the Spain women's national basketball team. At club level, she played in 2007 with the Los Angeles Sparks of the United States' WNBA., the Polish team Wisła Can-Pack Kraków and the Spanish teams Universitari Barcelona, Ros Casares Valencia and Perfumerías Avenida, where she retired in 2015. Marta Fernández is the sister of Spanish international and Real Madrid shooting guard Rudy Fernández.

Wang Yanyi, is a Chinese immunologist. In 2018, she became the director general at the Wuhan Institute of Virology and the deputy director for Wuhan in the China Zhi Gong Party.