Lennon has outlined the progress that McGregor has made in the past few years since he had the Scotland international in his first spell as Celtic manager.
Lennon told The Telegraph about McGregor: “He was only a boy when I first saw him. He then went and had a great spell at Notts County. It’s all down to himself, his hard work and his mindset.
“He’s another big-game player. He thrives in those occasions and you can play him in a number of positions as well. It doesn’t faze him. He has real intelligence as a footballer and physically he’s a really good specimen now as well.
“He’s not even at his peak yet. He’s got another four, five, six really good years in him. I’m delighted with him.”
Progressing at Celtic
McGregor has progressed well at Celtic in recent years, especially under Lennon’s predecessor Brendan Rodgers.
Under the former Liverpool manager, who is now in charge of Premier League club Leicester City, the 25-year-old has been superb, and there is no doubt that he is one of the best players in his position.
Celtic have already won the Scottish League Cup this season, and the Glasgow giants have also progressed to the semi-finals of the Scottish Cup and are firm favourites to clinch the Scottish Premiership title yet again this campaign.