The Fete de St Helier is taking over Parade Gardens on Saturday 18 and Sunday 19 July.
Street food, traditional treats, and beverages are available from all over the world.
As well as enjoying entertainment and rides, islanders can also browse artisan crafts, handmade goods, and local produce.
The pilgrimage to remember the life of the Parish's patron Saint begins at 2pm at the Town Church.
All are invited to join the route, which will make its way through the Fete de St Helier and out to Elizabeth Castle, before returning to the Town Church for refreshments.
Constable Inna Gardiner says it's a celebration for everyone:
"If St Helier thrives, Jersey thrives. This weekend, there is so much to do, you can enjoy exactly what you want to enjoy.
"St Helier belongs to everyone."
Surrounding roads close at 6pm on Friday 17 July and reopen at 6am on Monday 20 July.
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