Gunter misses out so Kelly startsSteve Clarke has made two changes to the side that beat Cardiff in the FA Cup on Saturday ahead of tonight's clash with Millwall.
Stephen Kelly replaces the injured Chris Gunter at the back after the right-back came off with an ankle knock in Wales at the weekend. New signing Jure Travner is named on the bench for the first time.
The match-winner at City, Hal Robson-Kanu, is also back in the starting eleven, with Garath McCleary starting the game on the bench.
Jamie Mackie returns to the squad after injury, while Jake Taylor has travelled with the squad but is not named in the eighteen.
Former Royals Shaun Cummings and Dan Harding start in Ian Holloway's defence tonight, while Jos Hooiveld makes his Millwall debut.
Millwall: Forde; Cummings, Nelson, Hooiveld, Harding; Gueye, Abdou, Williams, Fabbrini; Gregory, Maierhofer.
Subs: King, Beevers, Dunne, Upson, Martin, Cowan-Hall, Fuller.
Reading: Federici, Kelly, Obita, Hector, Pearce (c), Chalobah, Norwood, Williams, Robson-Kanu, Blackman, Pogrebnyak.
Subs: Andersen, Travner, Cooper, Karacan, McCleary, Mackie, Cox.