It goes without saying that men and women can have a purely platonic relationship with no romantic notions whatsoever. Like, duh.

However, this picture of two 'Harry Potter' stars has seen normally sensible grown-ups lose their minds over a potential romance between them.

Emma Watson and Tom Felton, aka Hermione Grainger and Draco Malfoy, were pictured in their pyjamas as Felton apparently taught his former co-star to play guitar.

The photo's location was tagged as South Africa, leading people to speculate that they're on holiday together. Felton also posted a picture of himself on the beach, crediting Watson as the snapper.

Just two friends, taking a holiday together. Okay? Nothing to see here.