| Don O'Neill | |
| Nationality: | Irish |
| Birth Date: | 12 June 1966 |
| Birth Place: | Ballyheigue, County Kerry, Ireland |
| Education: | Barbara Bourke College of Fashion Design |
| Label Name: | THEIA |
Don O'Neill (born 1966) is an Irish fashion designer. He was born in the seaside village of Ballyheigue, County Kerry, Ireland. Initially training as a chef, O’Neill was able to study to be a fashion designer, his true passion, after winning a full tuition scholarship to the Barbara Bourke College of Fashion Design.[1] After traveling the world and working for famous designers and fashion houses such as Christian Lacroix, he arrived in New York, where he spent ten years working with evening-wear designer Carmen Marc Valvo and three years as head of the Badgley Mischka diffusion label.[2] In 2009, THEIA was launched. As of 2013, O'Neill served as the Creative Director[3] of the label.
He has dressed Carrie Underwood[4] at the 2013 Grammys and Oprah Winfrey[5] at the 2012 Oscars.
O’Neill became married in 2016.[6] As of 2023, he resided in Ireland.[7]