The cast of LazyTown is composed of talented individuals who bring their characters to life through their performances. The main cast includes:
- Magnus Scheving as Sportacus
- Jóhannes Haukur Jóhannesson as Robbie Rotten
- Stefán Karl Stefánsson as Robbie Rotten (original actor)
- Chloe Lang as Stephanie
- Julian O. B. T. W. H. R. O. D. M. I. B. M. O. B. R. as Ziggy
- Félix Sánchez as Pixel
- Jenna Lee James as Trixie
