Boleslav William Felix Robert "Bill" Sienkiewicz (pronounced
sin-KEV-itch) (born May 3, 1958) is an
Eisner Award-winning American artist and writer best known for his comic book work, primarily for
Marvel Comics'
The New Mutants and . Sienkiewicz often utilizes
oil painting,
collage,
mimeograph, and other forms generally uncommon in comic books.