Wanyama still has three years on his current deal while Hooper is into the final 18 months of his terms at Parkhead.
Both players have been linked with moves to the Premier League and other clubs around Europe after impressing this season.
But Celtic chief executive Peter Lawwell anticipates the meeting with Juventus in the last 16 of the Champions League in February and March will ensure the pair do not leave in January.
"From my point of view, a game with Juventus has got to be quite powerful," he said. "From their point of view? I couldn't comment.
"We'd love to see them at Celtic come the game in February. At the moment, we are still talking to them. These things can take time.
"Victor still has two-and-a-half years to go, so we are more relaxed on that than we are with Gary. But we are relaxed with both. We still have them for a period of time.
"We have gone to them and said, 'how's about it?'. We like to be ahead of the game. We didn't have to do it but we went to them and hopefully we can end up in a good place."
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