Over the years, we have seen many celebrities come out and publicly announce their support of the Parkhead club - and here are the most famous ones among the lot.
9. Susan Boyle
Hoops superfan SuBo once revealed that she planned to wear a Celtic strip for her big breakthrough moment on Britain's Got Talent. “It was the moment my life changed for the better and a moment I’ll be eternally grateful for," she said. "Thank goodness I didn’t go on stage in my Celtic strip like I had originally planned.” Photo: Photo: JPI Media
10. Gerard Butler
Gerard Butler is Celtic-daft but a busy Hollywood schedule means he doesn't get along to many matches these days. The Paisley-born actor has played on the Parkhead turf for a number of charity matches in the past. Photo: Photo: Getty Images
11. John Higgins
Four-times world snooker champion John Higgins is another lifelong Celtic supporter. Photo: Photo: Third Party
12. Lewis Capaldi
Lewis Capaldi is a big Hoops fan, and the Whitburn chart sensation even invited a number of Celtic stars to appear in the video for his hit song Bruises. Photo: Photo: Third Party