Stefan Karl Stefansson

Stefan Karl Stefansson (born 10 July, 1975) is an Icelandic actor who is now famous as his character Robbie Rotten on LazyTown, after he was diagnosed with pancreatic cancer in August 21, 2016 due to "We Are Number One but" videos uploaded on YouTube, and also has his own GoFundMe page. He died on August 21, 2018 due to a severe case of cancer.