Celtic Bolsters Left-Back Options with New Signing Days After Tierney’s Return
Celtic have made another bold move in the transfer market, securing a deal to sign Peterborough United’s promising left-back Harley Mills just days after confirming the return of club legend Kieran Tierney. The Scottish Premiership champions are clearly focused on strengthening their defensive depth as they aim to maintain their dominance domestically and compete in Europe.
Kieran Tierney, a Celtic academy product, rejoined the Hoops on a five-year deal from Arsenal on June 10, 2025, marking an emotional homecoming for the 28-year-old Scotland international. Tierney, who made 170 appearances and won 10 trophies in his first spell at Celtic, is expected to be a cornerstone of Brendan Rodgers’ squad. However, with uncertainties surrounding fellow left-back Greg Taylor’s contract, which expires this summer, Celtic have acted swiftly to secure additional cover.
Harley Mills, a 20-year-old rising star from the English Football League, has attracted attention for his dynamic performances at Peterborough. According to reports, Celtic faced competition from Fulham, who tabled a £1 million bid, but the Hoops’ vision and Rodgers’ reputation for nurturing young talent swayed Mills to choose Parkhead. The transfer fee remains undisclosed, but the move is seen as a strategic acquisition to provide both competition and a long-term successor for Tierney.
Rodgers expressed his delight at the double coup, stating, “Kieran’s return is massive for us, and adding a talent like Harley ensures we’re well-equipped at left-back. Both players bring quality and hunger, which is vital for our ambitions.” The signings reflect Celtic’s proactive approach in the transfer window, addressing potential gaps while maintaining their successful player-trading model.
Mills, known for his pace, defensive tenacity, and ability to contribute in attack, is expected to serve as a backup to Tierney while developing under Rodgers’ guidance. Fans are buzzing with excitement, with many believing the combination of Tierney’s experience and Mills’ potential could solidify Celtic’s left flank for years to come.
As Celtic prepare for the 2025/26 season, the addition of Mills alongside Tierney signals their intent to dominate Scottish football and make an impact in European competitions. With pre-season looming, all eyes will be on how Rodgers integrates his new defensive recruits.
