Robert Pattinson and Kristen Stewart

The rumoured couple were very coy about their relationship and kept it under wraps for a long, long time.

They were, at that point, just a couple on screen and were still relative unknowns. Rob was mostly famous for his role as Cedric Diggory in 'Harry Potter and the Goblet of Fire' and Kristen was still referred to as the girl from 'Panic Room'.