James And Oliver Phelps (Fred And George Weasley)
Two 14-year-old twins who had no previous acting experience took a risk and skipped school to attend Harry Potter auditions back in 2000. The result? They were cast as Fred and George Weasley, an iconic prankster duo that turned out to be their most memorable role so far. After coloring their hair back to brunette, the actors went on to star in different roles after the series, as twins and individually. They starred in Own Worst Enemy, as well as the drama Danny and the Human Zoo, alongside Evanna Lynch.