Lisa Marie Simpson is a fictional main character in the animated television series The Simpsons. She is the middle child of the Simpson family. Voiced by Yeardley Smith, Lisa first appeared on television in The Tracey Ullman Show short “Good Night” on April 19, 1987. Cartoonist Matt Groening created and designed her while waiting to meet James L. Brooks. Groening had been invited to pitch a series of shorts based on his comic Life in Hell, but instead decided to create a new set of characters.