Isabelle Collin Dufresne (6 September 1935 – 14 June 2014), known professionally as Ultra Violet, was a French-American[1][2] artist, author, and both a colleague of Andy Warhol and one of his so-called Superstars.

[2][5] In 1954, after a meeting with Salvador Dalí, she became his "muse", pupil, studio assistant, and lover[2][6] in both Port Lligat, Spain, and in New York City.

"[7] In the 1960s, Dufresne began to follow the progressive American Pop Art scene including Jasper Johns, Robert Rauschenberg, and James Rosenquist.

In 1963, Dalí introduced Dufresne to Andy Warhol at the Saint Regis New York Hotel,[5] and soon she moved into the orbit of his unorthodox studio, "The Factory".

She followed this appearance by starring in John Chamberlain's The Secret Life of Hernando Cortez (1969), filmed in Mexico and co-starring Taylor Mead.

This autobiography was edited extensively and partially translated from French to English by her New York penthouse roommate Natalie Durkee.

[citation needed] In 2011, filmmaker David Henry Gerson released Ultra Violet for Sixteen Minutes, a short documentary showing her perspectives on fame, art, religion, and her current artistic practice.

TV interview for the German documentary about obsessive–compulsive disorder (OCD), Wie ich lernte, die Zahlen zu lieben (How I Learned to Love the Numbers), by Oliver Sechting and Max Taubert.

[22] Her last exhibition at the Dillon Gallery in Manhattan, Ultra Violet: The Studio Recreated, closed three weeks before her death.

[5] On 12 August 2014, independent record label Refinersfire released a posthumous limited edition 2-disc collection of original music and private conversations of Ultra Violet and Andy Warhol.

The music was recorded in the late 1960s and early 1970s, and features cover performances of "La vie en Rose", "Mojo Queen", and the original songs "Famous for Fifteen Minutes" and "Moon Rock".

[23] In 1973, a near-death experience with an ulcerated colon[5] and a bout with depression launched Ultra Violet on a spiritual quest, culminating in her baptism in 1981.