Harriet Seitler

Media and Brand Executive, Former Chief Marketing Officer of OWN and Harpo Studios, Former Course Hero Chief Brand Officer

Bio

Harriet is Co-Ceo of SignUp Media, a Time 2026 Invention of the Year, bringing sign language to media platforms around the world.

She is co-founder of Really Good Partners, a creative + strategic marketing and business development advieory.

Harriet was CMO for Oprah Winfrey/ Harpo inc for 25 years. She also ran marketing and brand for ESPN, MTV, and learneo. She was a GSV Advisor from 2015 to 2025.