Celtic have finalised a four-year deal for Newcastle United goalkeeper Fraser Forster.
The 24-year-old has completed a permanent switch to the Scottish Premier League champions after two seasons on loan from the Magpies.
"This is a massive club and I feel like this is a step forward in my career," Forster told the club's official website. "I want to win things as a team and improve as an individual and I think I will be able to do that at Celtic.
"It also gives me a great opportunity to play in the Champions League if we get through the qualifiers. I really enjoyed my time in Europe last season so I will be looking forward to it if it happens again.
"I enjoyed last season as a whole and we have a great young squad here. The players and the coaches make it an enjoyable place to be and I like being a part of this team."
Celtic manager Neil Lennon added: "We are delighted that Fraser has committed his future to the club and we believe he will be a magnificent addition to the squad. He gives us that continuity so this is something we are really pleased about. He is a top-class keeper."
Forster was part of Celtic's best home defensive record for 90 years, with just six goals conceded.