The Thorntons Classics come in a black box with a gold pattern. The chocolates include flavours such as creamy fudge, hazelnut nougat and country caramel.
The design was created by the celebrity henna tattoo artist Ash Kumar.
Thorntons brand manager Emma Dickinson said: "Eid and Diwali are growing celebrations in the UK and confectionery gifting is a huge part of these festivals.'
Kumar's client list includes Shilpa Shetty, Madonna, Julia Roberts and Demi Moore. He also holds the Guinness World Record for the fastest henna artist in the world.
He will visit the Thorntons Birmingham High Street store on 18 September to celebrate Eid, and the Thorntons Ilford, London store on Saturday 10 October.
Kumar will offer Thorntons customers free henna tattoos with every purchase of his specially designed box.
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