Mike Tyson is expecting Anthony Joshua to show America what a "beast" he is against Wladimir Klitschko.
The heavyweight legend will be stateside watching Saturday's Wembley Stadium showdown, which is being shown live on Showtime, alongside Sky Sports Box Office.
Tyson, the former undisputed world champion, admits he is a big admirer of Joshua and the impact he has had on the blue-riband division.
"I am looking forward to this one," he told Sky Sports pundit Johnny Nelson.
"I'm excited we are going to get to see Joshua. He is just a beast. A big beast."
With American rivals HBO also showing the Wembley event, Joshua-Klitschko will become only the third fight in history to be seen on both American channels.
Floyd Mayweather and Manny Pacquiao's 'Fight of the Century' followed the 2002 battle between Lennox Lewis and Tyson.
The 50-year-old Tyson likened Joshua to another hard-hitting heavyweight, but refused to rule out Klitschko's chances of victory.
"Joshua reminds me of a young George Foreman," he said.
"He is just wrecking anyone that's in front of him to get to the top. He is demolishing everyone.
"In my mind, it's got to be Joshua early on - and I hope he does it - but if it goes late it could be Klitschko."
Watch Anthony Joshua vs Wladimir Klitschko at Wembley Stadium on April 29, live on Sky Sports Box Office. Book the event online here or via your Sky remote.