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Gary Gianni (born 1954) is an American comics artist best known for his eight years illustrating the syndicated newspaper comic Prince Valiant.
After Gianni graduated from the Chicago Academy of Fine Arts in 1976, he worked for the Chicago Tribune as an illustrator and network television news as a courtroom sketch artist.
He also illustrated numerous magazines, children's books and paperbacks. He made his comic book debut in 1990 with illustrated adaptations of The Tales of O. Henry and 20,000 Leagues Under the Sea for the Classics Illustrated series. He went on to work for Dark Horse Comics he contributed to Indiana Jones and the Shrine of the Sea Devil and The Shadow.
He illustrated Wandering Star Press’s Savage Tales of Solomon Kane (1998) and Bran Mak Morn: The Last King (2001) by Robert E. Howard.
After John Cullen Murphy retired from Prince Valiant in 2004, Gianni began drawing the strip, continuing until March 25, 2012, when Thomas Yeates became the strip's illustrator on April 1, 2012.
On October 6th 2015, the book A Knight of the Seven Kingdoms—a prequel to George R.R. Martin's A Song of Ice and Fire series—was released, which included illustrations by Gianni.
Gianni won the 1997 Best Short Story Eisner Award for his collaborating with Archie Goodwin on Heroes in DC Comics' Batman: Black & White.