Watch: Hollywood star Michael Fassbender appears in Killarney school's Christmas video 

The A-list actor and singer-songwriter Paddy Casey made guest appearances in the comedy video released by St Oliver's NS

Michael Fassbender is a former schoolmate of Noel O'Sullivan and school principal Colm Ó Súilleabháin, are of whom attended St Brendan’s College in Killarney.

When Michael Fassbender arrived for a seasonal visit to a school in his hometown how could he turn down the offer of a role in its festive movie?

Especially one being shot by two of his former schoolmates.