Saturday Kitchen, in 2002. Since then Gregg has found fame talking about all things food-related, and has presented shows like Eat Well for Less and Inside the Factory.
But it is his role on MasterChef and Celebrity MasterChef, which he co-presents with fellow chef, John Torode, that Gregg is probably best known for.
Most fans of the chef will know that:Gregg kick-started his career by selling vegetables at a stall in Covert Garden, but it didn't take long for him to set up his business, George Allan's Greengrocers, which was hugely successful.
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