Although they were enemies on screen for ten years, 'Harry Potter' stars Tom Felton and Rupert Grint are very good friends in real life. They're so close that - just like normal groups of friends - they poke fun at each other to show support.

Tom Felton reportedly did just that for Rupert Grint's first Broadway show in New York by pulling the ultimate prank. Felton felt that he could better support Grint's appearance in 'It's Just A Play' by meeting him at the theatre's exit looking like a normal fan.

The 'Rise Of The Planet Of The Apes' actor put on a long black wig under a beanie, glasses, and a camera as he waited for his friend to come out. He was also spotted by an Instagram user and promptly photographed.

He reportedly called himself Bob and asked for a selfie from his unsuspecting friend.

"And then Tom Felton #aliasbob showed up to the stage door in a horrible wig to take a #selfie with Rupert," the Instagram user posted, including a photo of the disguised actor.

She promptly added several hashtags that made fun of his chosen alias: "#chooseanewalias #bobishorrible."

'Harry Potter' stars Tom Felton and Rupert Grint reportedly had a good laugh at the prank when the former took his "horrible wig" and revealed himself to the latter.

"The pair [has] a long history of playing pranks on each other on the set and off," a friend of the two reportedly told The Mirror. "It was hilarious."

Felton's ultimate prank is some sort of payback for Grint's stunt during the premiere for 'Rise Of The Planet Of The Apes' in 2011. The red-haired actor appeared on the red carpet with 'I [heart] Tom Felton' scribbled on his shirt.

Although it has been three years since the last 'Harry Potter' movie was released, the cast, who worked together for a decade, reportedly remain close friends.

What did you think of the 'Harry Potter' stars Tom Felton and Rupert Grint's pranks on each other? Would you like to see them work on a new movie together again?