Gifted cartoonist who first achieved fame with his "Keep On Truckin'" character he named "Mr. Natural."Created characters like Fritz the Cat and the Snoid.Self-taught artist.Plays the ukelele.Has recorded and performed with two jazz bands: "R. Crumb and his Keep On Truckin' Orchestra" and "R. Crumb and the Cheap Suit Serenaders"Is often credited with creating the first "underground" comic book, "Zap Comix".Worked with American Greetings as a color seperator and greeting card illustrator.Has a large collection of vintage 78 RPM records, mostly rare jazz from the 1920's.Is an accomplished banjo player.His daughter, Sophie Crumb , is an accomplished cartoonist in her own right. 2004 saw the publication of her own comic book, "Belly Button Comix".Friend of underground "everyman" comic writer Harvey Pekar and independent filmmaker Terry Zwigoff .Animation legend Matt Groening ( "The Simpsons" (1989) and "Life Is Hell") was a fan in his youth and still is, though he keeps Crumb's books hidden from his own children.Is the most famous and successful underground cartoonist in history and was the first to become mainstream.Drew the famed cover for the Big Brother & The Holding Co. "Cheap Thrills" album featuring Janis Joplin . Encouraged by the strong response, other record labels offered Crumb similar deals, but he turned them all down.Turned down an offer to appear as a guest band on "Saturday Night Live" (1975) with his band, the Cheap Suit Serenaders.Credits his older brother Charles Crumb for introducing him to art as a means of venting his emotional distress. Charles would actually bully Robert into drawing and creating.Son of Beatrice Crumb .Was portrayed by James Urbaniak in American Splendor (2003).Brother of Sandra Crumb, Carole Crumb, Charles Crumb and Maxon Crumb .Brother Charles Crumb committed suicide a year after the filming of Crumb (1994).Father, with Dana Morgan , of son Jesse Crumb , and, with Aline Kominsky , of daughter of Sophie Crumb .Friend and collaborator of Harvey Pekar .