Ernst Franz Hermann Happel (29 November 1925 – 14 November 1992) was an Austrian football player and coach.
He is regarded as one of the most successful managers ever, winning both league and domestic cup titles in the Netherlands, Belgium, Germany and Austria as well as winning the European Cup twice, the first in 1970 and the second in 1983, and a runners-up medal at the 1978 FIFA World Cup.