Diane Vallesteros is a Filipina-Canadian, SOCAN Foundation award-winning composer based within the GTA. She has scored numerous short and feature length films that have screened across various film festivals, such as, VIMFF, RIFF, BANFF, VAFF, and IFFSA. Recognizing her passion for storytelling through music, many of her musical contributions underscore projects that explore real-life stories and human experiences. Diane has composed for award-winning films, such as: “Me+Her,” “Ahon,” and “SCRAPS.” Some of her recent credits include dramatic narratives: “Deux moments de vie,” and “Sorry, It’s A Girl,” and documentary films: “How She Dares,” and “Outsiderness.” She has also contributed additional music to feature films, such as: “Call Me Crazy” (Amazon Prime US, Tubi), “Lady Parts,” and “Butter Bandits.”

In 2022, Diane took part in the Screen Composers Guild of Canada’s Mentorship Program and mentored under award-winning, Montreal-based composer, Evan MacDonald. In the same year, she was a selected participant in SOCAN Foundation’s Screen Music Lab and mentored under award-winning composer, Steph Copeland, and award-winning director, Rich Williamson (Compy Films). In 2025, she was a selected composer participant in the Women in Post program, presented by Netflix through The Academy of Canadian Cinema & Television. 

Diane’s musical journey began as a classically-trained pianist studying under the Royal Conservatory of Music. She earned her Bachelor’s of Fine Arts in Music at York University with the initial focus in classical performance. She then pursued further studies in Sheridan College’s Music Scoring for Screen and Stage program. Prior to film and media composition, Diane performed as a pianist for the Mississauga Ballet Association, and dabbled in the world of musical theatre as a pit musician with On Its Way Musical Productions’ “Next to Normal” (2019), and York University’s Vanier College Productions’ “Shrek the Musical” (2019). 

Her instrumental EP, “Astro Reveries,” is now available on all streaming platforms.