Team GB and Paralympics GB's Rio stars will be paraded through Manchester on Monday to celebrate their Olympic achievements.
The celebration will be the first of back-to-back "heroes parades" to toast Great Britain's success in Rio, with the second celebration being held in London on Tuesday.
Both British squads finished second in their respective medal tables at this summer's Games.
Hundreds of thousands of people are expected to turn out for the parade, which will begin at 4.30pm and will last around an hour as it travels through Manchester city centre before finishing at an event in Albert Square.
Singers Olly Murs and Rebecca Ferguson are expected to perform as part of the entertainment.
The athletes, set to include the likes of Nicola Adams, Max Whitlock and the Brownlee brothers Alistair and Jonny, will then travel down to London for another celebration on Tuesday.
Ennis-Hill retired from athletics at the age of 30 having this summer won heptathlon silver in Brazil to go with her gold from London four years ago.