From 1 April Diet Coke will help promote the film through a promotion in the US. It will feature a prize trip to Hollywood to meet a star from the film. American media support will include a television ad with a "Hollywood premiere" feel, created specifically for the promotion. In addition, radio, cinema, and Internet advertising will tout the film and promotion, and in-store point-of-sale materials will feature Jennifer Garner as Jenna Rink.

The promotion also features an offer in every specially marked package of Diet Coke at participating retailers. One in three packages offers a free companion ticket to see the film (buy one ticket, get one ticket free). Two in three packages offer $ five rebated on the purchase of one of five DVD titles including the Julia Roberts starrer Mona Lisa Smile.