Ernesto Fritz Hoost (born 11 July 1965) is a Dutch retired kickboxer.
A four-time K-1 World Champion, Hoost is considered to be one of the greatest kickboxers of all time.
Debuting in 1993 at the K-1 World Grand Prix 1993, where he came just one win short of the world title, Hoost announced his retirement thirteen years later on 2 December 2006 after the K-1 World GP Final tournament in Tokyo Dome, Japan.