Before Forrest left for international duty with Scotland, who face Kazakhstan and San Marino away in upcoming 2020 European Championship qualifiers, he revealed the seamless transition at the club.

"It was massive that he came in," said the 27-year-old winger, who was given his debut in 2010 by Lennon in his first spell in the Celtic dugout.

"He's done really well and all the boys have bought into it straight away.

"He's been in a couple of weeks now and it feels as though he's never been away. It just feels right him being at Celtic.

"He's been a massive character at Celtic and done loads for the fans, so I think the club acted really quickly in getting him and it's worked out well.

"We want to push on now and make sure that stays.

"You saw in the last minute that everyone is buzzing and there's a real togetherness in the squad and that's definitely not changed. That's a big boost."

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