Benfica midfielder Paulo Bernardo has returned to Celtic in a permanent move, agreeing a five-year deal with the transfer subject to international clearance.
The 22-year-old midfielder spent last season on loan with the Scottish champions, who had an option to buy.
But negotiations dragged on over a transfer fee since the end of the season.
Bernardo, who has been capped up to under-21 level by Portugal, played 33 times for Celtic last season and scored four goals. He won Scottish Premiership and Scottish Cup winners' medals.
"It’s amazing for me and it’s a big step in my career," he told CelticTV.
"I really enjoyed last season when we won the championship and the cup, so it was great for me – my first two titles in my career, too.
"I love the club, I love the fans and I love the city, too, so it’s very, very nice to be here again."
And manager Brendan Rodgers added: "Paulo made a great impact for us at some real pivotal moments, delivering for us when he needed to for the team and we are sure that he can bring that same determination, ability and quality to us over the next number of years."
