About
Stefán Karl Stefánsson was a beloved Icelandic actor and singer. He gained international recognition for his portrayal of Robbie Rotten, the mischievous antagonist in the popular children's television series 'LazyTown'. His energetic and humorous performance made Robbie Rotten a memorable character for children around the world. Stefánsson's work on 'LazyTown' had a significant impact on children's entertainment.
Career Timeline
LazyTown debut
Cast as Robbie Rotten in children's series 'LazyTown,' bringing his theatrical energy to the role. The show begins airing internationally on Nickelodeon.
LazyTown peak popularity
The show reaches peak viewership globally, making Robbie Rotten beloved character among children. Stefánsson's comedic performance becomes signature of the series.
LazyTown ends production
Show concludes after successful run, leaving lasting impact on children's entertainment. Stefánsson's character remains iconic among fans who grew up with the series.
We Are Number One meme
LazyTown song 'We Are Number One' becomes viral internet meme, introducing Stefánsson to new generation. The unexpected fame brings attention to his cancer battle.
Cancer battle fundraising
Internet rallies around Stefánsson during cancer treatment, raising significant funds. The outpouring of support demonstrates his impact and beloved status among fans.
Passes away from cancer
Stefánsson dies at age 43 after battle with bile duct cancer. His death is mourned by fans worldwide who grew up with LazyTown.
LazyTown legacy remembered
Stefánsson is fondly remembered for his portrayal of Robbie Rotten and the viral 'We Are Number One' meme. His work in children's entertainment and brave cancer battle maintain his moderate fame posthumously.
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Last updated: February 17, 2026







