Nina Horan Niall Horan's twin sister. She ran away from home when she was nine years old and ended up in an orphanage. An American family adopted her a year later. Now she is 20 years old and her real brother is a member of a famous boy band called One Direction. She really wants to see her brother again and moved to London along with her best friend. When her best friend wins a contest to spend a week with One Direction, she sees her twin brother back after 11 years. Will Niall recognize Nina? Will he be angry because she just left without saying goodbye? Will Niall bring her back to her real family? What will happen when she meets the other members of One Direction? Will she find love with one of them? Read Niall Horan's Twin Sister to find out.