[2] Her designs have featured in magazines such as Vogue, Marie Claire, Women's Wear Daily,[3] InStyle and the television series Sex and the City.

[8] Customers include Liv Tyler, Miley Cyrus,[9] Lindsay Lohan, Stevie Nicks, Suri Cruise,[10] Julia Roberts,[11] and The Pussycat Dolls.

She also produces Trelise Cooper Interiors, a fabric range made in association with textiles house Charles Parsons.

[13] Cooper is a patron of the Breast Cancer Research Trust, an advocate for domestic violence awareness and supports Habitat for Humanity.

[24] In 2014 Trelise Cooper sparked controversy when she repeated the same offense made by Victoria's Secret in 2012 and Chanel in 2013 by having models wear sacred Native American feathered headdresses.

Filmmaker Taika Waititi was quoted as saying ''I think I understand what Trelise means by '70s vibes' - a time when it was cool to be culturally insensitive and racism was super awesome.

Nice throw back to better times...'[26][27] In December 2020, Cooper was criticised for naming a new floral polyester dress design the "Trail of Tiers", after the forced relocation of about 46,000 American Indians between 1830 and 1850 by the United States Government.