This season Millwall broke their club transfer fee record that they've paid for a player twice, firstly buying Tom Bradshaw from Barnsley for £1.25 million, and then a week later buying midfielder Ryan Leonard from Sheffield United for £1.5 million.

[3] Millwall knocked out Premier League side Everton on the way to reaching the FA Cup Quarter-final for the eleventh time in their history.

Millwall spent the majority of the season in a relegation battle, securing their place in the Championship with two games to spare at the expense of Rotherham.

[7][8] The third round draw was made live on BBC by Ruud Gullit and Paul Ince from Stamford Bridge on 3 December 2018.

[9] The fourth round draw was made live on BBC by Robbie Keane and Carl Ikeme from Wolverhampton on 7 January 2019.