Simon was once in love with Jacqueline McKenzie. Jacqueline McKenzie is an actress. After this love life, he got married to Cassie Yukawa. Cassie Yukawa is the concert pianist. As a husband and wife, they have already welcomed three children together. His nationality is English and has diverse ethnicity.

Simon was raised in Peterhouse, Cambridge, there he got enrolled at some college with a major in English literature. He finally graduated from there in . Later on he joined Jacques Lecoq Institute and he studied theater there. In he formed the British theatre company Complicite. He is the director of its production Street of Crocodiles and The Three Lives of Lucie Cabrol. At the end of , he directed the play Mnemonic. He has been active as an actor since the late . In , he appeared in a drama anthology television series Screenplay starring the role of Martin. Next year he starred in an ITV comedy series The Two of Us. In , he made his feature film debut by starring in a mystery thriller film Kafka. In the mid , he appeared in the movies like A Business Affair, Being Human, Tom & Viv and so on. He is now aged years old. His net worth is unknown.