Redknapp said he does not think the programme will be more challenging than being a football manager, although he is admittedly none the wiser.
Betway's Alan Alger said: "At the age of 71 and having lived most of his life as a professional footballer or football manager, Harry Redknapp is set to be pushed well outside of his comfort zone". I think they will be surprised but I have known for quite a while and I am both excited and nervous now.
Made in Chelsea star Georgia "Toff" Toffolo was the victor of the 2017 edition of the show and this year's line-up includes a famous football manager, an X-Factor runner-up and a former soap star.
"The weirdest thing for me is going in as myself", said the 30-year-old, who is in a relationship.
Malique Thompson-Dwyer - aka Prince McQueen on Hollyoaks - also admitted to some trepidation.
He said: "I have got bad eating habits".
Jurgen Klopp: Liverpool need title win for season to be a success
The hosts seemed fired up by it - winger Marko Marin was shown a yellow card for protesting in the fifth minute. Jokanovic will be well aware that Liverpool's players will be fired up to make amends.
Doctor Who actor John, 51, is now the favourite to win the entire series already with odds at 11/4, while DIY SOS presenter Nick Knowles is hotly tipped to be the first voted out of the hugely-popular reality competition at 7/2.
Piers Morgan went in hard on Harry for signing up to the ITV reality show in a heated rant on yesterday's Good Morning Britian.
Former Doctor Who star Barrowman, meanwhile, said he was looking forward to "losing his love handles".
The sporting legend, who's going Down Under alongside EastEnders' Rita Simons, Nick Knowles and John Barrowman, is being paid a £500,000 for going in, making him the highest paid contestant in the show's 18-year history.
However, it seems Simons, 41, may actually be disturbing other people's slumber.
About 10 million people tune in to the show every night.
The Betway boss added: "As for who'll be walking across the rope bridge to an early exit, Nick Knowles is the one they've backing in our first elimination betting at 7/2".
The 42-year-old later confirmed he would not return to TV presenting until 2019.