Celtic have signed defender Cameron Carter-Vickers from Tottenham on a four-year deal.
The USA international spent last season on loan in Glasgow and played a key role in helping Ange Postecoglou's side win the Scottish Premiership title and League Cup.
Carter-Vickers, 24, made a total of 45 appearances for Celtic, scoring four goals including one on his debut against Ross County and a key winner against Rangers at Ibrox.
"I am so pleased to complete my move to Celtic and I really could not be happier," he said.
"I have loved every minute of my time at Celtic so far and I really wanted to be part of the club's future.
We have a fantastic group of players at the club, we have a really good spirit and atmosphere among us and we all worked so hard together to deliver the league and League Cup success last season.
"I wanted to make sure I was part of this group going forward and working under a great manager, and now we all want to achieve more
