Celtic complete the signing of Tottenham Hotspur goalkeeper on three-year deal
He'll compete for a place in Celtic's reserve team squad for the upcoming campaign.
After signing for the Hoops, Oluwayemi credited wonderkid Karamoko Dembele with helping to sell him on a move to Glasgow.
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Hide AdHe told the Celtic website: "Speaking to Celtic's website, he said: "I am delighted to be joining Celtic, it really is a dream come true and a massive opportunity for me.
"I know Karamoko very well and he has told me all about Celtic, the size of the club, the great supporters and the club's tradition for giving young players an opportunity.
"I am very excited about this move and I will be working hard, giving everything to the club to progress and make the most of this great opportunity."