Rosário O´Neill was born in Portimão and graduated in Business Management, dedicating herself early on to business life in the Algarve, while also pursuing plastic arts as a hobby without ever revealing her works beyond her circle of friend and family.
Without following the traditional paths of promoting artists, Rosário O´Neill was eventually discovered and invited to be present in Milan in 2014 at an exhibition showcasing new artists from various countries.
In her artistic development journey, Rosário O´Neill was invited to participate in one of the world´s largest art dissemination events, the London Biennale in 2015 and the Florence Biennale in October of the same year.
In 2016, she exhibited at the ArtExpo in New York, had a solo exhibition in 2018 in New York at the “Artifact” gallery, and in 2019, a solo exhibition at the Altice Foundation in Lisbon.