Bill Sienkiewicz (born Boleslav William Felix Robert Sienkiewicz, May 3, 1958) is an American comic book artist whose work fundamentally altered what visual storytelling could look like in mainstream US comics. Over a career stretching from 1979 into the present day, he has contributed as artist, colorist, inker, letterer, and writer across more than 600 issues, with his most sustained contributions appearing on Moon Knight, The New Mutants, Fantastic Four, and Elektra: Assassin.
What If...? #105 (1998)
His reputation was built largely through his 1980s work, when he abandoned the clean figurative conventions of superhero art in favor of something far more unsettling and expressive — oil painting, collage, photorealism, and mimeograph techniques combined to push individual pages toward abstraction. The effect on readers and fellow artists was considerable, and his approach remains a touchstone for anyone interested in comics as a visual medium rather than simply a narrative vehicle.
The New Mutants #29 (1985)
During his run on The New Mutants, Sienkiewicz co-created David Haller, the troubled mutant later known as Legion, who would eventually anchor the acclaimed FX television series of the same name. His collaboration with writer Frank Miller on Elektra: Assassin further demonstrated how far the form could be stretched without losing its audience. The work he produced across that decade is widely considered among the most formally ambitious in the history of American mainstream comics.