Galaxy is supporting the launch of the new Sex and the City film with a £2.7m marketing campaign, including TV and press.
It is also running an on-pack promotion offering a range of prizes, including seven luxury trips to New York and 200 pairs of fabulous shoes.
The instant-win promotions can be found on Galaxy 150g, Galaxy dark, Galaxy raisin, almond & hazlenut, Galaxy roasted & caramalised hazelnuts, Galaxy milk 47g, Galaxy caramel, Galaxy Minstrels 42g and Galaxy Ripple.
To celebrate the film, which opens in cinemas this month, the gold foil on the Galaxy 150g bar is being replaced with a "hot pink" colour to match the Sex and the City logos.
Bep Sandhu, Mars trade relations manager, says: "An association with the Sex and the City movie is big news for Galaxy. The limited-edition ’hot pink’ packaging and on-pack promotions will really engage our consumers."