Morgan was adopted by Tony King as his mother Bianca was pregnant with Morgan when she met Tony. However Bianca moved on with her life when Tony was sent to prison. When Tony was releced from prison years later, the truth came out that he had been sexually and mentally abusing Morgan's sister Whitney since the age of 12 and on Whitney's 16th birthday, the truth came out and Tony was arrested. Later Bianca and her ex-partner Ricky Butcher get back together and later got married. Ricky and Bianca then decide to change Morgan's name from Morgan Jackson-King to Morgan Butcher.
Morgan starts asking questions about who his father is, to which his mother Bianca replies that his father is Barack Obama. Knowing the truth, his sister Whitney secretly takes Morgan to see Ray Dixon, his real father. Ray did not know that Morgan existed and is delighted to meet his son. However, Whitney pleads with Morgan not tell Bianca that he has met his father. Ray soon turns up in Walford to see Morgan, and Bianca tries to hide Morgan from him, but soon realises that they have already met. She wants Ray to have nothing to do with Morgan until Whitney convinces her, and they spend time together. Bianca allows Ray to cook a meal for the family but tells him to leave when he mentions his daughter, Sasha Dixon. Morgan meets Sasha but Bianca is furious when she finds out.
Realising that Bianca is having some difficulties with her money, Tiffany and Morgan go to see their step great-grandmother Dot Branning at the laundrette. She tells them that when she had problems as a child, she felt better after being given a bath. Tiffany and Morgan then decide to run a bath for Bianca but accidentally leave the taps on when they go out. When they get home, the bath has overflowed and is leaking into the living room. Bianca is later caught stealing money and returns to prison, but this time located in Suffolk. Morgan then moves to Suffolk with the rest of his family to be near his mother, leaving his father in Walford. He returns for Ricky's sister Janine's wedding to Michael Moon, along with Ricky, Tiffany and Ricky's sister Diane Butcher. Ricky and Ray argue over Morgan, but eventually reconcile, before Ricky leaves with Morgan again. Morgan then moves back to Walford with his family for when her mother is released from prison, however he is saddened when his father moves away. He is also not pleased when Bianca returns from a trip to Manchester announces that her new boyfriend, Terry Spraggan and his children, TJ and Rosie are moving in.
Morgan left Walford on 12 September 2014 after moving to Milton Keynes with his mum, Terry, TJ, Rosie and TJ's daughter Beth while Liam went to live in Germany with Ricky and his girlfriend Cindy (Beth's mother). Morgan and Tiffany returned in November 2016 for Whitney's wedding to Lee Carter.