"It was really part of the design of the movie," Holmes, who appears in the film and acted as executive producer, told StyleList at a press conference at New York City's Gansevoort Park Avenue.
Not only did the young cast wear pieces from the brand on and off set, but they also shopped at women's offshoot Madewell and can be seen modeling limited-edition party attire from J.Crew's Fall 2010 collection in this month's catalog.
Duhamel, however, was more interested in praising wife Fergie's new fragrance, Outspoken by Fergie. "I just think she did a great job of picking it because that's a whole process that I didn't even know was part of it," he told StyleList.
The proud husband went on to brag about his spouse's hands-on approach and subtle sensibilities regarding her celebrity scent. "She was very much part of the whole thing and she wanted something that wasn't too much."
And Duhamel was perfectly pleased with her perfume. "She was wearing it one day and I was like, 'What is that?' She's like, 'You like it?' I'm like, 'Yeah, I love it!' She's like, 'It's the new fragrance.' And that was it!"
"The Romantics" opens in theaters Sept. 10.
In other news, check out the silver fox locks Ben Affleck sported at the Venice Film Festival.