Celtic have completed the double signing of Australia international Aaron Mooy and Lorient defender Moritz Jenz.
Mooy, 31, was a free agent following his departure from Chinese Super League side Shanghai Port and had held talks with several other clubs before opting for a move to Parkhead.
The midfielder has signed a two-year deal to reunite with manager Ange Postecoglou, having worked with the 56-year-old during his spell with the Australian team.
Jenz meanwhile joins on a season-long loan from France with an option to buy included in the deal for the Parkhead club.
The former Fulham youngster will provide competition for centre-back duo Cameron Carter-Vickers and Carl Starfelt.
Speaking of the two latest signings, Postecoglou said: “I’m delighted that we’ve been able to bring in both Aaron and Moritz to the club, and I’m sure they’ll be great additions to our squad.
“I obviously know Aaron from my time coaching the Australian national team, and he brings with him a wealth of experience at both club and international level.
“Moritz is a player we’ve been aware for a while now, and I’m pleased that we’ve been able to sign him.
“They’ve already had the chance to meet the rest of the squad, and I’m sure they’ll settle in very quickly into what is a very welcoming group of players, and I know that our supporters will be looking forward to seeing them both in a Celtic jersey.”
Celtic have already signed Cameron Carter-Vickers, Jota, Alexandro Bernabei, Benjamin Siegrist and Daizen Maeda during this transfer window.