Their characters were mortal enemies ever since arriving at Hogwarts for their first year of witchcraft and wizardry.
However it seems that off-screen Matthew Lewis and Tom Felton are good pals, as during their reunion they took to Instagram to share a jokey snap, the DailyMail reports.
Harry Potter star Matt, who played the lovable Neville Longbottom in the hit franchise, posted a picture of himself with Tom who was holding up a piece of Slytherin merchandise.
Matt, who starred as cowardly bully Draco Malfoy, slung his arm around his friend in the shot which had been captioned: 'Take your Slytherin paws off me, you damn dirty ape!'