Porter, who is the current favourite to win this year's Dancing on Ice, will partner Matt Evers on the UK jaunt.
Former Brookside star Ellison will also be taking part in the shows alongside her pro skater Daniel Whiston.
Torvill & Dean are choreographing the live tour and will also perform at the arena shows, which kick off in Newcastle on Friday, April 13.
Other celebs performing at the shows include last year's champion Sam Attwater, X Factor's Chico, soap star Matthew Wolfenden, Corrie's Andy Whyment and Sugababes singer Heidi Range.
The three-and-a-half-week tour will visit London, Manchester, Nottingham, Sheffield, Birmingham, Liverpool and Glasgow.
> 'Dancing on Ice': Matthew Wolfenden, Andy Whyment added to tour
> Chico, Heidi Range, Sam Attwater for 'Dancing on Ice' 2012