Dion Dublin has signed for Celtic until the end of the season after agreeing his release from Leicester City.
Dublin arrives at Celtic Park to agree a short-term deal
The versatile veteran played under Celtic manager Gordon Strachan while at Coventry City and can play in central defence or up front.
"Although I am 36, I feel fit and I am ready to go. I'm just happy to get the chance," Dublin told the club website.
"What are you going to say? When you get to play for Celtic, it is an incredible experience."
Dublin, who also had spells at Manchester United and Aston Villa is eligible to face Motherwell in Wednesday's CIS Insurance Cup semi-final.
"I know Alan Thompson from Villa, Paul Telfer from Coventry and Roy Keane from my Manchester United days," added Dublin.
"Hopefully, they will welcome me and make it easier for me because I am quite nervous.
"I may be 36 but I am still quite nervous to come to a place of this size.
"I know the fans are one of the biggest groups in the world. You don't get too much history of Celtic down south.
"But, having seen some games and played in friendlies against Celtic, I am just gobsmacked at the size of the place.
"I am just looking forward to being part of a good squad of players and, hopefully, I can add to that and help the team to success this season."
Celtic are short of a target man in attack, following Chris Sutton's departure to Birmingham, while Craig Beattie is injured.
And, despite his side leading the SPL by eight points, Strachan has had trouble in central defence, with his side leaking too many goals for his liking.
Bobo Balde is on duty at the African Cup of Nations, Du Wei failed to win a long-term deal and Roy Keane picked up an injury after playing one game at the back.