Sam Weller is a fictional character in The Pickwick Papers (1836), the first novel by Charles Dickens, and the character that made Dickens famous. A humorous Cockney bootblack, Sam Weller first appeared in the fourth serialised episode. Previously the monthly parts of the book had been doing badly, selling only about 1,000 copies a month — but the humour of the character transformed the book into a publishing phenomenon, raising the sales by late autumn of 1837 to 40,000 a month.

The Posthumous Papers of the Pickwick Club was the first novel by English author Charles Dickens. His previous work was Sketches by Boz, published in 1836, and his publisher Chapman & Hall asked Dickens to supply descriptions to explain a series of comic "cockney sporting plates" by illustrator Robert Seymour, and to connect them into a novel. The book became a publishing phenomenon, with bootleg copies, theatrical performances, Sam Weller joke books, and other merchandise. On its cultural impact, Nicholas Dames in The Atlantic writes, "'Literature' is not a big enough category for Pickwick. It defined its own, a new one that we have learned to call 'entertainment'." The Pickwick Papers was published in 19 issues over 20 months, and it popularised serialised fiction and cliffhanger endings.