Mo Harris

In-universe information
In-universe information
Other names	Mo Porter; Big Mo
Occupation	Handler of stolen goods; Market stallholder (clothing); Barmaid; Cleaner ; Call centre worker
Family	Slater
Father	Sidney Porter
Mother	Joyce Porter
Brothers	Stan Porter; Colin Porter
Husband	Jimmy Harris (backstory)
Sons	Billy Harris
Daughters	Viv Slater; Jean Harris
Granddaughters	Lynne Hobbs; Kat Slater; Belinda Peacock; Little Mo Mitchell;
Other relatives	Zoe Slater; Freddie Slater; Tommy Moon; Bert Moon; Ernie Moon

Mo Harris
Mo Harris
EastEnders character
	Laila Morse as Mo Harris (2024)
Portrayed by	Laila Morse ; Lorraine Stanley (2004 flashback)
Duration	2000–2016, 2018–2022, 2024–present
First appearance	Episode 2003; 18 September 2000
Classification	Present; regular
Created by	Tony Jordan
Introduced by	John Yorke (2000, 2018); Chris Clenshaw (2022, 2024)
Spin-off; appearances	Slaters in Detention (2003); Pat and Mo (2004); EastEnders: E20 (2010); The Point of Mo Return (2024);
	; Mo as she appeared in EastEnders: Pat and Mo, played by Lorraine Stanley
Other names	Mo Porter; Big Mo
In-universe information
Other names	Mo Porter; Big Mo
Occupation	Handler of stolen goods; Market stallholder (clothing); Barmaid; Cleaner ; Call centre worker
Family	Slater
Father	Sidney Porter
Mother	Joyce Porter
Brothers	Stan Porter; Colin Porter
Husband	Jimmy Harris (backstory)
Sons	Billy Harris
Daughters	Viv Slater; Jean Harris
Granddaughters	Lynne Hobbs; Kat Slater; Belinda Peacock; Little Mo Mitchell;
Other relatives	Zoe Slater; Freddie Slater; Tommy Moon; Bert Moon; Ernie Moon

Mo Harris (also known as "Big Mo") 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 soap "bubble" Pat and Mo, delving into her past with Pat Butcher (Pam St Clement/Emma Cooke). 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 (Bobby Brazier); their return was broadcast on 20 May 2024.