MILLWALL chairman James Berylson said Neil Harris “jumped at the opportunity” to return to the club after the Lions confirmed their former manager as the successor to Joe Edwards.
Edwards was sacked after 19 games in charge with Harris taking over ahead of the game against Southampton on Saturday.
David Livermore returns as the assistant manager and Adam Barrett is also retained as part of the staff.
Millwall chairman James Berylson said: “I’d like to start by thanking Neil for taking on this challenge, which is one I know he is very excited and enthusiastic about.
“Neil knows this club as well as anybody and understands exactly what it takes to be successful here.
“We are in a difficult moment but he and Dave have jumped at this opportunity and that says a lot about their affection for Millwall and their fierce drive and determination to help improve performances and results.
“I look forward to working closely with Neil and Dave, and continuing to do so with Adam, and promise them all our total support for the weeks and months ahead.”
Millwall director of football operations and recruitment Alex Aldridge added: “In welcoming Neil back to the club we have secured the services of a man who has Millwall in his heart and who will give his absolute all every minute of every day.
“He’s been away and grown his experience but his principles and values remain the same. It’s all about togetherness, unity, hard work, and professionalism.
“He and Dave are excited by this opportunity and along with Adam are relishing the challenge of picking up vital points.”