A clip of the ABBA’s Arrival opener When I Kissed the Teacher has hit, and as well as featuring an awesome song, it also features an awesome songwriter.

There’s Mr Bjorn Ulvaeus at front right, looking all stern and otherwise stony-faced as one of the teachers who, we guess, was potentially kissed.

On top of that discovery, as it’s a lyrical video we also realised that we’ve been singing wrong words all over the place since we were little. Oh well.

Mamma Mia! Here We Go Again hits Aussie cinemas on July 19.

Get into the original Mamma Mia! at JB Hi-Fi.