However, Greg Barrowman’s moment in the limelight was short-lived when both a matinee and evening performance were cancelled due to a burst water main.
John Barrowman is starring in Aladdin at the Clyde Auditorium alongside comedy duo The Krankies, but after taking ill, 18-year-old Greg stepped into his shoes for Monday night’s performance.
A burst water main in the Finnieston area of city then saw two performances cancelled on Tuesday, but Greg treaded the boards again on Wednesday.
It’s understood the Torchwood star is suffering from an upper respiratory complaint and has been advised to rest.
A spokesman for the SECC said: “Like a lot of people just now, John Barrowman is suffering from the flu virus that is going around.
“In terms of future performances, as time goes on it is a case of evaluating his health prior to a performance to see if he is match-fit.
“John is genuinely disappointed at not being able to make the performances he has missed due to the flu virus – he is a professional who will always perform should he be able to.
“He is doing everything he can to make a full recovery.”
Greg’s early shot at fame started when his cousin heard him sing karaoke and declared: “Get him into stage school.”
The teenager went on to study at Glasgow Academy of Theatre Arts.
Speaking to the Evening Times earlier, the former Johnstone High pupil, said: “I can’t believe how it all came about. I had never sang before until we had a family get together and it became a karaoke night.
“John heard me sing the Ronan Keating song When You Say Nothing At All and immediately announced that I should become a performer.
“He had a talk to my mum and dad about me, and said he thought I had talent. So we started to look for a stage school.”
Customers with tickets for Tuesday were advised they could receive tickets for an alternative performance, subject to availability, or a full refund of tickets for the affected performances.
Should your tickets have been purchased via ticketSOUP.com, your choice of alternative date/refund can be arranged in person at the ticketSOUP.com Box Office at the SECC, or via telephone on 0844 395 4000.