Lucille "Lucy" van Pelt is a fictional character in the syndicated comic strip Peanuts, written and drawn by Charles Schulz. She is the older sister of Linus and Rerun. Lucy is a crabby and cynical eight-year old girl, and is often bossy toward the other characters in the strip, particularly to Linus and Charlie Brown. She is often referred to as the world's greatest fuss-budget.
An older Lucy is seen at a Peanuts reunion in "Mother Tucker".