The special occasion marked the beginning of the final year for the senior pupils.
As well as being a glamorous night out, with everyone dressed to impress, the formal celebrated friendships, hard work, and the journey the pupils have taken together.
Photographer Tony Hendron dropped in to the pre-formal reception at the school on Friday afternoon to capture these memorable moments.
9. Formal occasion
Angel Pereira, centre, pictured with his parents, Maria and Orelio at the pre-formal reception. PT38-227. Photo: TONY HENDRON
10. Formal occasion
Sonia Gama came to see her son, Alberto Da Cruz off to the school formal on Friday. PT38-228. Photo: TONY HENDRON
11. Formal occasion
Daniella Lynn, right, pictured at the reception with boyfriend, Sebastian Kesy and her mum, Lisa Douglas. PT38-230. Photo: TONY HENDRON
12. Formal occasion
Looking forward to the formal are Eva Williamson, left, and Róisín McAleese. PT38-232. Photo: TONY HENDRON