Kieran Tierney, born on 5 June 1997 in Scotland, plies his trade primarily as a left back. Standing at a solid 5ft 10in (1.78m) and weighing 11st 13lb (76kg), Tierney sports the number 63 jersey, making his presence felt on the pitch for Celtic Football Club, as well as representing the Scotland national team. His current market value hovers around the £7m mark, as stated by Transfermarkt.
Joining Celtic's ranks as a trainee in July 2005, Tierney's journey to first-team stardom was nothing short of impressive. He made his debut during the 2014 - 2015 season with two league appearances and the rest, as they say, is history. He racked up an impressive 120 league appearances over the course of five seasons playing for Celtic, notching 11 goals in the process.
The 2019 - 2020 season brought a new challenge for Tierney as he transferred from Celtic to English Premier League giants, Arsenal, for a reported fee of £25m. From Scotland to England, Tierney embraced the challenge with a commendable 96 appearances in league matches over five seasons, scoring four goals for the Gunners. In August 2023, he took another leap, this time to the sunny expanses of Spain, featuring for LaLiga outfit Real Sociedad on a loan deal.
The sojourn in Spain was short-lived, and Tierney returned to his English employers in July 2024, following the completion of his loan at Sociedad. But the call of his home club proved too strong, and in July 2025, Tierney made his much-anticipated return to Celtic, where it all began more than two decades ago. His return has been marked with a total of 26 first team appearances and five goals in league matches in the current 2025 - 2026 season alone.
Not just a club man through and through, Tierney has also proudly represented his country in the World Cup Qualifiers for Europe during 2024 - 2026 and has also had a packed schedule featuring for Celtic in various competitions including the League Cup, Scottish Cup, Champions League Qualifiers, and the Europa League during the 2025 - 2026 season.
