KIERAN TIERNEY has committed his future to Celtic until 2021 after signing a five-year deal with the Bhoys today.

The 19-year-old was the club's breakthrough star of last season, providing a goal and six assists in 23 Premiership appearances to help the Hoops to the title. 

Celtic announced today that he has signed a new contract with the club after winning the Young Player of the Year award at the end of the campaign.

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The left-back capped an impressive campaign by making his debut for Scotland in a 1-0 friendly win over Denmark in March.

"Celtic are delighted to announce that Kieran Tierney has signed a new five-year deal that will see him remain at the club until at least the summer of 2021," read a club statement.