Socceroo Tom Rogic was unable to cap a big week at Celtic with a goal but it mattered little as the champions beat Motherwell 2-0 in the Scottish Cup final.
First-half goals from Callum McGregor and Olivier Ntcham were enough to earn the runaway Premiership champions a third trophy of the season and repeat last year's treble, a feat unprecedented in the Scottish game.
Socceroos midfielder Tom Rogic, who signed a new five-year deal with the Hoops earlier in the week, fired wide of the target from 20 metres out after just six minutes and also had a tamer effort saved later in the opening term.
The former A-League man scored a famous injury-time winner against Aberdeen in last year's final.
Motherwell hit the woodwork in the second half as they staged a spirited rally, but as in the League Cup final in November, Celtic triumphed against the same side by the same score.
Celtic manager Brendan Rodgers has steered the Glasgow side to his sixth domestic trophy in two seasons in charge.
Rodgers vowed there would be no let-up from his side despite a second successive domestic clean sweep.
"I'm going to push them even harder next year," he told Sky Sports. "It's a historic day and one that will live with everyone forever.
"Obviously immensely proud to overcome all the emotion that goes with it. It's been a tough competitive season for us.
"We picked a system that we thought would allow us to open up spaces on the pitch and scored two exceptional goals.
"The mentality of the team was strong. We dealt with the physical aspect of the game and then our quality came through."