List of Famous people born on January 21st

Michael Ludwig Hariyanto Arbi is a former badminton player from Indonesia who rated among the world's top few singles players in the 1990s. He is the younger brother of Eddy Hartono and Hastomo, who were also world class badminton players.

Sven Erik Herman Thomas Vikström, professionally known as Thomas Vikström, is a Swedish vocalist best known for working with hard rock and heavy metal bands including doom metal bands Candlemass and power metallers Stormwind. He is the son of opera singer Sven-Erik Vikström. He is also a permanent vocalist for the symphonic metal band Therion.

Edan Lui Cheuk-on, better known by his mononym Edan, is a Hong Kong singer, presenter, actor, and a member of the Hong Kong boy group MIRROR. Apart from his group activities, Edan has presented various television variety shows and starred in television dramas, most notably Ossan's Love (2021).