The on-pack promotion, which launches next week (14 April), gives consumers the chance to win one of hundreds of London 2012 ticket packages when they purchase specially marked packs.
Additionally, consumers also have the chance to win one of a 1,000 prizes a day by entering codes from wrappers online.
The promotion will feature on 18 Cadbury products including; Cadbury Dairy Milk, Wispa Gold, Boost Duo and Twirl Bites.
It will be backed by TV, outdoor, press, radio advertising, social media, PR and online activity.
Elsewhere, Kraft is launching a limited edition 400g Cadbury Dairy milk chocolate bar to mark the Diamond Jubilee this summer. The bar is inspired by the pack design in circulation when the Queen was crowned in 1952.
The promotion ends on 7 July.