Celtic F.C. their sixth successive league title on 2 April 2017, with a record eight league games to spare. As Celtic's unbeaten domestic run continued, they subjected Rangers to their heaviest defeat at Ibrox since 1915, 5–1, on 29 April. Celtic's 2–0 win over Hearts on 21 May saw them finish 30 points ahead of second-placed Aberdeen in the league, with a record 106 points, and the team became the first Scottish side to complete a top-flight season undefeated since Rangers in 1899. On 27 May 2017, Celtic clinched their fourth treble by defeating Aberdeen 2–1 in the Scottish Cup final. The
Celtic F.C. cup final win saw Celtic go through the entire domestic season unbeaten. On 26 November 2017, Celtic won their 4th consecutive domestic trophy for the first time since Jock Stein's side in 1970 with a 2–0 win against Motherwell in the Scottish League Cup final. On 17 December 2017, Celtic's record unbeaten run finally ended after 69 games with a 4–0 defeat to Hearts. Despite this disappointment, Celtic secured their 7th consecutive league title with a 5–0 win over Rangers at Celtic Park. The season ended with Celtic winning the first ever 'Double-Treble' (a treble in two consecutive seasons) in