The UK rollout of the brand follows a successful pilot scheme in the Midlands.
Nestlé is planning to use TV, print and online advertising, as well as PR, to encourage people to sign up to the programme via a phone line. It is currently using search advertising to drive people to JennyCraig.co.uk.
The UK launch is part of the Swiss giant's plans to bring the quintessentially US brand to Europe and further afield. Nestlé launched Jenny Craig in France in March this year, and is also planning to bring the brand to India and China.
Nestlé believes that Europeans will embrace a weight loss plan that has proved successful in the US.
Nestlé does not break out specific financial results for Jenny Craig, but estimates claim it is a £340m a year business for the company.
Richard Laube, chief executive of Nestlé Nutrition, said: "Weight management is a core business for Nestlé Nutrition and Jenny Craig is fully in line with Nestle's overall vision as the world's leading nutrition, health and wellness company."
Weight management is a growing business in the UK and Nestlé claims the UK market is worth at £2bn
The bulk of Jenny Craig customers are women and in the US, it has made use of female celebrities, including Kirstie Alley, in its TV advertising.
Jenny Craig was purchased by Nestlé's nutritional division in 2006.
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