With over 15 years as a songwriter and touring performer, Jennifer began composing for film and advertising during COVID-19 when her record label connected her with new opportunities. She creates piano and string music for visual media.

Working closely alongside Luke Branch, their work includes scores for "Crossroads" (2025) on Apple TV and Amazon Prime, and she's currently recording for "40 Dates and 40 Nights" starring Annie Potts and Bailee Madison.

O'Neill's portfolio features short films like "Mind The Gap" (shown at Super Shorts Film Festival) and "Alone Together," plus promotional films for SEEPark, Estuary Festival, and Charlton Triangle Homes.