Freddy Thielemans (11 September 1944 – 29 January 2022) was a Belgian socialist politician who was the mayor of the City of Brussels from 2001 to 2013, and previously also for a period in 1994.

Freddy Thielemans learnt to play rugby with Brussels Barbarians RFC during the late 1970s and early 1980s as a prop, took part in the Vancouver Tour in 1982 and also represented Belgium at Rugby Union.

Thielemans graduated in Commercial Sciences before working as a teacher in some high schools in Brussels.

His political career started in 1983 when he worked on the cabinet of Hervé Brouhon, then the mayor of Brussels.

In 2016, he suffered a serious fall that led to a brain haemorrhage and a time in a coma.