The 18-year-old, born in the Isle of Man, moved to Scotland at a young age and joined his boyhood club Celtic at the of just seven, as he started to make his way up through the ranks with the Glasgow giants.
This season, Tierney has taken Scottish football by storm. The teenager has replaced Emilio Izaguirre as Celtic's first-choice left back, and he has made more than 20 appearances for the Bhoys this term.
Having made his Scotland debut against Denmark on Tuesday night, Tierney's career is already advancing at a rapid pace - and a Premier League move could also be on the horizon.
The Scottish Sun report that Southampton - who have swooped to sign Victor Wanyama, Fraser Forster and Virgil van Dijk in each of the last three summers - are now keen to land Tierney.
It's claimed that the Saints will lodge a 'big-money deal' for Tierney, with manager Ronald Koeman keen to raid Celtic again, even though he has two left backs already in Ryan Bertrand and Matt Targett.
Celtic would hate to lose a homegrown talent like Tierney, but if Southampton's proposal really is a huge offer, it will be hard for Ronny Deila's men to turn it down - especially given that Tierney has only played one season of first-team football in his youthful career.
Would Tierney be a good signing for Southampton?