There's no denying that pretty much everyone has a teacher that had some profound effect on them throughout their life.

Whether it's helping out with their subject, encouragement and guidance, or even just recognising a talent and nurturing it, people remember their teachers. On last night's Late Late Show, proper A-list actor Domhnall Gleeson was on and pretty much blindsided by Tubridy with an old video of him performing in Scóil Íosa's production of Grease in the early '90s.

Needless to say, you can Domhnall turn a bright shade of pink as he sees a younger version of himself, but it gets even sweeter when he's reunited with his music teacher, Miss Keogh.

Take a look.