Half of a Yellow Sun Joseph Mawle ("Game of Thrones," "Clapham Junction") has joined Thandie Newton, Chiwetel Ejiofor, Anika Noni Rose and John Boyega in Biyi Bandele's "Half of a Yellow Sun" which is currently shooting in Nigeria and London. The story is based on Chimamanda Ngozi Adichie's novel about Biafra's struggle to establish an independent republic in Nigeria.