Millwall Football Club is a professional football club in Bermondsey, South East London, England. They compete in the EFL Championship, the second tier of English football. The club was formed in 1919 1885. In Millwall's 92 seasons in the Football League from 1920–21 to 2018-19, the club have been promoted eleven times (five times as champions) and relegated nine times. They have spent the majority of their existence yo-yoing between the second and third tiers of the Football League. The club did have a brief spell in the top flight between 1988 and 1990, in which they achieved their highest ever league finish of tenth place in the First Division in 1988–89. Millwall reached the 2004 FA Cup final and qualified for Europe for the first time in their history, playing in the UEFA Cup. The club have also won two League One play-off finals in 2010 and 2017, the Football League Group Cup in 1983, and were Football League Trophy finalists in 1999.