'the Athletic Elf') is a fictional character from the Icelandic children's television show LazyTown, created and portrayed by Magnús Scheving.

Sportacus is so engaged in his life of physical activity that he does parkour just to get from place to place—even doing acrobatic flips just to get from one side of his kitchen table to the other—and the children have to instruct him on how to relax.

Sportacus lives in a large airship above LazyTown, which contains his bed, food, and other equipment, including a signed autograph from Jackie Chan.

In the second play, Glanni Glæpur í Latabæ (Robbie Rotten in LazyTown), Sportacus became more similar to his current version.

He traveled around in a hot air balloon and wore a brown-and-yellow version of his current outfit, albeit with a larger, looser hat and sculpted chest piece.

In 2010, Sportacus and then first lady of the USA Michelle Obama visited the Bruce Monroe school in Washington as part of the Let's Move!