Aéropostale is a casual clothing and accessories brand aimed at young teens.
"I really do give a lot of attention to each one of my outfits, on and off the carpet," Moretz told People.
"So to get recognition for it makes this such a fun and honourable experience."
Moretz was recently seen in Dark Shadows and Hugo.
She is to appear in the Carrie remake in the title role, originally played by Sissy Spacek in 1976.
Watch the trailer for Dark Shadows below: