The one-time Celtic favourite is leaving Sheffield Wednesday this summer.
According to The Sun, Hooper has emerged as a target for Celtic - if Lennon is appointed manager on a permanent basis - and would be keen on a return to Parkhead.
It follows confirmation of the 31-year-old's release by Sheffield Wednesday after Sunday’s Championship season finale against QPR, in which he made only his sixth senior appearance in almost 18 months.
Hooper, though, scored 82 goals in 138 games during Lennon's first spell as Celtic boss, and was held in extremely high regard by the Northern Irishman.
"If I had to put a price on Gary’s head then it would be £35 million," Lennon said, as quoted by the Daily Mail, in January 2012. "Even if we did receive a knock-out price for Gary, would we be able to replace him? Trust me, goalscorers of his calibre are not easy to find."
It was the former Celtic midfielder that brought Hooper to Glasgow in a £2 million deal from Scunthorpe United.
And, as quoted by the Daily Telegraph after the Englishman's 2013 transfer to Norwich City, Lennon said: "For me, he is one of my best signings in so many ways - value for money, the improvement in the player, his goals obviously, the link-up play.
"I think he has been the best striker here since Henrik and he will be a huge loss to us but we move on.
"He has aspirations to play for England and in the Premier League and he's got that now. I wish him well.
"Part of me wants to strangle him but you don't want to stop the progress of some individuals.
"Gary feels the next step forward to try to break into the England team is to play in the Premier League, and obviously there is the financial side of things as well."
Would the former Sheffield Wednesday striker be a worthwhile signing for Celtic?
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