Kieran Tierney was born on 5th June 1997 in Scotland. With a height of 5ft 10inches (1.78m) and weighing 11st 13lb (76kg), he primarily plays as a left back. His journey with Celtic began in 2005 when he joined as a trainee, wearing the number 63 jersey. In addition to his duties on the pitch for Celtic, Tierney also proudly represents the Scotland national team.
The Scottish defender's time at Celtic was decorated with consistent performances, as evidenced by his noteworthy league match appearances and goal scores. More specifically, Tierney's unique journey with Celtic includes two debut appearances during the 2014-2015 season. This auspicious start was followed by 23 appearances and one goal during the 2015-2016 season; 24 appearances and another goal during the 2016-2017 season; 32 appearances and three goals in the 2017-2018 season; and 21 appearances in the 2018-2019 season. After a break, Tierney returned to Celtic for the 2025-2026 season, where he has already made nine appearances and scored a goal.
Regarding Tierney's current market value, it stands around £7m, according to Transfermarkt.
In August 2019, after a fruitful tenure with Celtic, Tierney transferred to Arsenal in the English Premier League for a fee of roughly £25m. At Arsenal, he managed to keep his impressive form steady, with regular appearances and a few goals scored over numerous seasons.
After his brief stint at Arsenal, Tierney went on loan to Spanish team Real Sociedad in LaLiga during August 2023. After one season at Real Sociedad, he returned to his former team, Arsenal. However, in July 2025, Tierney made his way back to his old stomping ground, turning out once again for Celtic. Since his return, he continues to be a vital piece of the Bhoys' defensive line-up.
His time on the pitch hasn't been solely devoted to club football, though. Tierney has represented Scotland in various qualifying matches for the World Cup and European Championship. He's also participated in Celtic's League Cup and Champions League qualifiers, while also serving a stint in the Europa League during the 2025-2026 season.
