Millwall Football Club ( / ˈ m ɪ l w ɔː l / ) [ 1 ] is a professional football club in Bermondsey , South East London , England. They compete in the EFL Championship , the second level of English football . Founded as Millwall Rovers in 1885, the club has retained its name despite having last played in the Millwall area of the Isle of Dogs in 1910. From then until 1993, the club played at what is now called The Old Den in New Cross , before moving to its current home stadium nearby, called The Den . The traditional club crest is a rampant lion , referred to in the team's nickname The Lions . Millwall's traditional kit consists of dark blue shirts, white shorts, and blue socks.
