The money-can't-buy' promotion for kids features on 300g chocolate and strawberry flavour packs from next month and will offer one lucky winner the chance to interview their favourite star.
The interview will be televised live on the Disney Channel Kids Awards and the top prize also includes VIP tickets with backstage passes for a family of four to attend the awards ceremony in October.
Other prizes include 100 pairs of tickets to the Awards and goody bags.
A new pack design and improved recipe also roll out next month, featuring a more impactful logo and flagging up the natural ingredients in the product to encourage mums to purchase the product.
Spokesman Martin Perkin said: "Since its launch in 1999, BN has built a loyal consumer base which is continuing to grow."