Julia Roberts says the late Martin Luther King Jr and his wife Coretta Scott King paid the hospital bill for her birth. The actress, 55, revealed the couple made the gesture as her parents couldn’t afford the fee, and said her mum and dad befriended the Kings while living in Atlanta running a theatre school. She told Gayle King, in a clip showing her in conversation with the journalist last month that has now been shared online by a fan: “One day Coretta called my mother and asked if her kids could be part of the school because they were having a hard time finding a place that would accept her…