Johnny Flynn (born 14 March 1983) is a South African-born British musician, singer, songwriter and actor. He is the lead singer and songwrit…Johnny Flynn (born 14 March 1983) is a South African-born British musician, singer, songwriter and actor. He is the lead singer and songwriter of the band Johnny Flynn & The Sussex Wit. Flynn has starred as Dylan Witter in the Channel 4 and Netflix television sitcom Lovesick (previously known as Scrotal Recall), and portrayed a young Albert Einstein in the American period drama Genius.