The earliest published version of the fable was in 1853 and originally featured three little pixies.
The tale became more widely popularized after the main characters were changed to pigs and the story included in The Nursery Rhymes of England in 1886.
ORIGINAL TALE SPOILER ALERT: The wolf dies in the end.
UPDATED SPOILER ALERT: In the various retellings, sometimes the first two brother pigs (straw house and stick house) die along the way.
MODERN DAY SPOILER ALERT: None of the pigs die and the wolf only burns his tail after trying to climb down the chimney to eat the pigs.