Mo Harris, is a fictional character from the BBC soap opera EastEnders, who made her first appearance on 18 September 2000, played by Laila Morse. Mo was also played by Lorraine Stanley in the 2004 spin-off, Pat and Mo, delving into her past with Pat Butcher. Mo is a highly comical character and her tendency for dodgy deals bring much of the show's light entertainment. In July 2012, Morse's contract was not renewed, but she was not immediately written out of the series and continued to make occasional appearances until 21 January 2016. Mo's reintroduction was announced in December 2017 and she returned full-time on 16 March 2018. On 6 February 2021, it was announced that Morse would be leaving the role once again and she departed on 3 June 2021. On 28 June 2022, it was announced that Mo would return for a short stint later in the year. Mo returned on 10 August 2022 and departed on 14 September 2022. On 28 February 2024, it was confirmed that Mo would be making a permanent return to EastEnders alongside her great-grandson Freddie Slater ; their return was broadcast on 20 May 2024.