The 22-year old Dutch defender joined the Hoops from FC Groningen for £2.6million in June and has emerged as a star for the Glasgow giants.
van Dijk netted a wonderful solo goal in the 1-0 Boxing Day win over St Johnstone at McDiarmid Park and that prompted plenty of praise from this boss.
"If we'd dropped points we probably would not have been talking about Virgil's goal," said Lennon.
"So I'm glad we are because it was an unbelievable piece of individual brilliance. He certainly lit up the game.
"I'm not expecting him to do that all the time but he's an exceptional player, a great defender and he's certainly made us better.
"He's added the physical presence and height we've been missing. He's been a good piece of business for us."
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