The print campaign, which was developed in conjunction with Wieden & Kennedy New York and launches on 2 September, is called "dress normal". It embodies Gap’s message that people should create their own personal style.
In addition to Huston, the star of The Addams Family and The Royal Tennenbaums, other celebrities featured in the campaign include Mad Men’s Elisabeth Moss, Boardwalk Empire’s Michael K Williams, Girls’ Zosia Mamet, and Jena Malone, who started in The Hunger Games: Catching Fire.
More celebrity endorsements will be unveiled after the September launch.
The print ads, which were shot by Glen Luchford, will run in the US, Canada, UK, France, Italy and Japan, as well as other international markets. Gap is also planning a TV ad as part of the "dress normal" campaign.
Seth Farbman, the global chief marketing officer at Gap, said: "Finding your own version of ‘dress normal’ is an art – my normal is different from your normal, and that’s the essence of the campaign.
"This fall, Gap celebrates dressing for yourself and finding those perfect items – a pair of jeans, a T-shirt – that make you feel confident to be your most authentic self."