Who is the youngest child in the Incredibles family?

Jack-Jack is the youngest child in the Incredibles family.

Jack-Jack Parr is the infant son of Bob Parr, also known as Mr. Incredible, and Helen Parr, also known as Elastigirl. His older siblings are Violet and Dash, making him the youngest of the three Parr children. Because he is still a baby, much of his character is built around his parents’ uncertainty about what powers he may develop.

In the first film, the family initially believes Jack-Jack may be the only Parr without superpowers. That assumption changes during the climax, when he reveals several abilities while Syndrome attempts to kidnap him. Later stories show an unusually broad range of powers, including teleportation, flight, laser vision, fire transformation, and shapeshifting.

Jack-Jack is sometimes confused with Dash because both are boys, but Dash is the older son and the family’s speedster. Violet is the eldest child and only daughter. The short film Jack-Jack Attack also places his infancy and unpredictable powers at the center of the story.