The former Celtic boss has been discussing the state of Scottish football.
Indeed, the ex-Bhoys boss, who is currently in charge of Championship side Bolton Wanderers south of the border, feels Rangers are needed in the top flight to increase 'revenue, crowds and competition.'
And Lennon believes Rangers' potential promotion can also help Celtic's Champions League chances.
Indeed, Scottish sides have struggled in Europe due to a lack of competition in the Premiership, according to the 43-year-old. The Gers' return, then, is something Celtic need in Europe - as well as the rest of the top flight.
“It’s essential for the game in Scotland that Rangers get back to the Premiership as quickly as possible,” Lennon said. “They are struggling but new people have come in who I think have the best interests of the club at heart.
“[New manager] Stuart McCall had a fantastic record at Motherwell. They need to get back to the Premiership for the state of the game up there - in terms of revenue, crowds, competition.
“It’s important and I think that’s why Scotland has struggled [in continental competition]. Celtic need it as well - the competition has been missing.”
Celtic midfielder Kris Commons has recently expressed a similar sentiment with regards to Rangers.
Indeed, the 31-year-old wants the Gers to achieve promotion to the Scottish Premiership as he 'loves' the fierce Celtic-Rangers rivalry - and can't wait to play against them again.
Next up for the Bhoys is a league clash against St Mirren early next month, although the international break gives the Scottish champions some respite until then. Rangers, meanwhile, host Cowdenbeath next weekend.