Justin Bieber wants to fight Tom Cruise

Cape Town – Justin Bieber has challenged Tom Cruise to a fight.

On Sunday the singer tweeted: "I wanna challenge Tom Cruise to fight in the octagon. Tom if you don't take this fight you're scared, and you will never live it down. Who is willing to put on the fight?"

He tagged Dana White the head of Ultimate Fighting Championship (UFC) in the tweet.

It is not clear why or what prompted the 25-year-old singer to challenge the 56-year-old actor to a duel.

Tom, who is currently working on a Top Gun sequel, has not responded to the challenge.

UFC fighter Conor McGregor, on the other hand, is backing the fight.

He wrote on Twitter that his company will host the match and urged Tom to accept the challenge.