Kenny Jackett has resigned as Millwall manager after almost six years in charge of the second-tier English club.
Jackett joined Millwall in 2007 and was the sixth longest-serving manager in English football behind Alex Ferguson, Arsene Wenger, David Moyes, Tony Pulis and Exeter's Paul Tisdale.
Jackett led Millwall to the FA Cup semifinals this season but four defeats in the last five games saw the club finish just two points above the relegation zone in the Championship.
He says in a statement, ''I personally feel the time is right for a new challenge, and also for a new manager to come into Millwall with fresh ideas, to take the club forward towards its long term goal of reaching the Premier League.''
Millwall last played top-division football in 1990.