Edwards spent two games in interim charge of Wolves in 2016 and a season as AFC Telford boss before becoming head coach of England’s under-16 team.
He was appointed by Forest Green Rovers in May 2021 and they won promotion as League Two champions in 2022, prompting Watford to recruit Edwards following their relegation from the Premier League.
Having taken charge at Vicarage Road in May, he was sacked in September but returned to management at Luton two months later when Nathan Jones left the Hatters for Southampton.
Following the euphoria of promotion, the step up to the top flight proved too much as Luton won only six of their 38 Premier League games and were relegated following a 3-1 defeat at West Ham on 11 May.
Edwards said he was “really motivated to get us going again” and added: “We’ve taken a hit, but I feel – and I think everyone is the same – that we are still on this upward trajectory.”
Luton have yet to add to their squad in the summer transfer window following the departures of Luke Berry, who has signed for Charlton, plus Dan Potts, Fred Onyedinma, Elliot Thorpe and Admiral Muskwe.
However, chief executive Gary Sweet said: “Usually with relegation comes wholesale change, but we do things differently at Luton Town and can see progression.
“Securing Rob has been our main target since the season ended because it enables that continued growth both on and off the pitch. The length of contract brings stability to everyone who works around him, including the players.
“It is a great cultural fit. He simply gets Luton both as a club and as a town, he’s been the perfect ambassador.”
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