Kieran Tierney, born on 5th June 1997 in Scotland, is a capable defender known for his performances as a left back for Celtic. Standing at 5ft 10in (1.78m) with a weight of 11st 13lb (76kg), Tierney has well utilised these physical attributes throughout his career. Notably, he dons the number 63 jersey and has been recognised for his international performances with the Scotland national team.
As reported by Transfermarkt, his current market value is estimated at approximately £7 million. Tierney's journey with Celtic began back in July 2005 when he joined the Premiership team as a trainee.
After working his way up through the ranks, Tierney made his first team debut in the 2014-15 season, clocking up two appearances in league matches. Thereafter, his contributions on the pitch were increasingly significant with 23 appearances and one goal in the 2015-16 season, 24 appearances and one goal in 2016-17, and 32 appearances with three goals in the 2017-18 season. During the 2018-19 season, Tierney turned out 21 times for Celtic in league matches, and in the current 2025-26 season he has already notched up eight performances and one goal.
The 2019-20 football season saw a significant shift for Tierney as he was transferred from Celtic to Arsenal in the Premier League for a fee of approximately £25 million. During his tenure at Arsenal, Tierney left a mark with 15 appearances and one goal in the 2019-20 season, 27 appearances and one goal in 2020-21, and 22 appearances and one goal in the 2021-22 season. In the subsequent 2022-23 season, Tierney made 27 appearances with no goals but returned to form in the 2024-25 season when he made 13 appearances with one goal.
In an interesting twist, Tierney was loaned out to Real Sociedad in LaLiga in August 2023. His stint in Spain saw him make 20 first team appearances in league matches for the 2023-24 season. Following this sojourn, Tierney returned to his parent club Arsenal in July 2024.
However, in July 2025, the cycle brought Tierney back to his alma mater as he returned home to Celtic. Since his return, Tierney has made a name for himself once again, notably in the 2025-26 season where he's made eight first-team appearances and scored one goal.
In addition to his journey across various leagues and teams, Tierney's career has seen international recognition, with appearances in a plethora of tournaments. His exploits include playing in the League Cup 2025-26 for Celtic (two starts, one substitute appearance), the World Cup Qualifiers Europe 2024-26 (one goal, three substitute appearances), Euro 2024 (two starts), Euro Qualifiers 2022-24 (five starts), Champions League Qualifiers 2025-26 for Celtic (two starts), Nations League 2024-25 (two substitute appearances) and the Europa League 2025-26 for Celtic (four starts).
