Both teams will wear black armbands with the Whites players and management wearing black armbands embossed with ‘Speed 11’
A minute’s applause will also be held ahead of the game after which both Simon Grayson and Millwall manager Kenny Jackett will lay wreaths.
A video montage featuring remembering Gary Speed will be played on the big screen.
Fans will also pay tribute with a special banner to Gary with the words ‘Go on Gary Speed, get one yourself son’ a reference to the famous commentary which accompanied his famous goal against Sheffield United in April 1990.
* Leeds United v Millwall kicks off at 12.30pm.