Hardy will play infamous criminals Ronnie and Reggie Kray, who ruled London's organised crime scene in the 1950s and 1960s, in a new movie about the notorious gangsters.
Kemp played Reggie alongside his brother and Spandau Ballet bandmate Gary as Ronnie in 1990 drama The Krays, and he has wished Hardy luck taking on the challenge of playing both characters.
Kemp says, "He's gonna play both parts, interesting. I had enough trouble playing one part. Tom's a great actor. That's his decision so I wish him luck."