Mo Harris
Portrayed by Laila Morse
Lorraine Stanley (flashback)
Introduced by John Yorke (2000, 2018)
Spin-off Appearances Slaters in Detention (2003)
Pat and Mo (2004)

E20 Series 1 (2010)

Gender Female Female
First Appearance 18th September 2000
Duration 2000–2016, 2018-
Address 31 Albert Square
Status Alive
Age 82
Date of Birth 18th February 1936
Occupation Dodgy Dealer/Pensioner
Classification Present; regular
HusbandJimmy Harris (1959–79)
FiancéFat Elvis
DaughtersViv Slater
Jean Harris
GranddaughtersLynne Hobbs
Kat Slater
Little Mo Mitchell
Belinda Peacock
Stacey Slater
Great-grandsonsFreddie Mitchell
Tommy Moon
Bert Moon
Ernie Moon
Great-granddaughtersZoe Slater
BrothersStan Porter
AuntsHilda Porter
NephewsBrian Slater
Other relativesHayley Slater
Lily Slater
Arthur Fowler
Hope Fowler
Rose Slater

Maureen "Mo" Harris (previously Porter) was born in 1936, the eldest child of an impoverished family in the East End of London.

She departed EastEnders in 2016, with Kat & Jean, leaving Stacey as the only Slater left.

In 2017, it was confirmed Kat Slater, Jean Slater & Mo would be returning to the show as part of a storyline branching from Kat and husband Alfie Moon's apparent deaths on Redwater.


At the age of 14 she becomes pregnant following a one-night stand with Stuart Mullins, a ticket collector for the Waltzer ride at a fairground in South London, and gives birth to their daughter Vivienne the following year in 1951.

Best friends with Pat Harris, Mo falls for Pat's older brother Jimmy and after a whirlwind romance they marry in 1959 and go on to have two children of their own: Billy and Jean. However, Pat threatens to disrupt their marriage due to her alcoholism and eventual prostitution, which diverts Jimmy's attention away from Mo and onto Pat; this results in Mo beginning an affair with Pat's pimp Tony Cattani in 1963. When Pat discovers them together she informs her brother but Mo denies Pat's accusations and as a result Jimmy disowns Pat and they move away to Lewisham. Jimmy later dies of cancer in 1979. His final wish is to make amends with his sister Pat but instead Mo neglects to inform her of both his death and his funeral.

Mo Slater returns to Walford after almost forty years away along with her Son-in-law Charlie Slater and granddaughters Lynne, Kat, Little Mo and Zoe. Mo's rivalry with Pat arises again, but they reconcile at Jimmy's grave on the twenty-fifth anniversary of his death.

Birth Times for Tommy & Zoe

Mo receives a phone call from Kat who wants Zoe's birth certificate. Mo meets Kat at a café, and gives her the certificate. Kat reveals to Mo that she conned a man, and now needs a new identity. Kat also lies to Mo, and says that her husband Alfie Moon is dead. Mo persuades Kat to come home to see her family, and Kat reluctantly accepts but when they both get home, men are waiting for Kat and her money. Alfie turns up at the Slater house and chases the men away. Mo is then shocked to learn that Kat is pregnant, and Alfie is not the father. When Kat goes into labour, Mo delivers her son, Tommy, on the floor of The Queen Victoria's barrel store.

On the same day, Ronnie Mitchell gives birth. On New Year's Eve, Ronnie's baby dies of cot death and she secretly swaps the babies. Alfie and the rest of the family then discover the dead baby, believing it to be Tommy.

In April Mo stole Flowers from Ian Beale a t Lucy's Coffin and wishes Kat Good Luck in her court how will Ian react when he sees mo doing the wrong thing and will she get arrested

Character development

2018 return

On the 20th December 2017, it was announced that Mo, portrayed by Laila Morse (Big Fat Gypsy Gangster, The Ninth Cloud) would be returning to EastEnders, along with fellow Slater ladies Kat and Jean, after moving to Kent to live with her granddaughter Belinda Peacock. No details have been released on upcoming storylines. Laila said of her return: "I’m really excited to be coming back. It’s the one question I’m constantly asked. I can’t wait to see everyone and get stuck back into life in Walford!", whilst EastEnders executive consultant said "The Slaters are one of the all-time great families in EastEnders and Albert Square has never felt quite the same since they scattered to different ends of the country, and in some cases beyond."


Abi Branning | Amy Mitchell | | Ben Mitchell | Bex Fowler | Billy Mitchell | Carmel Kazemi | | Denise Fox | Dennis Rickman Jnr | Donna Yates | Dot Branning | Ian Beale | Jack Branning | Jane Beale | Janet Mitchell | Jay Mitchell | Jill Marsden | Kathy Beale | Khoroush Kazemi (Kush) | Kim Fox-Hubbard | Lady Di | Lily Branning | Linda Carter | Louise Mitchell | Martin Fowler | Matthew Mitchell-Cotton | Mick Carter | Patrick Trueman | Pearl Fox | Phil Mitchell | Ollie Carter | Ritchie Scott | Sharon Mitchell | Shirley Carter | Sonia Jackson | Stacey Branning |Tina Carter | Vincent Hubbard | Whitney Dean  | Johnny Carter | Honey Mitchell | Max Branning | Steven Beale | Lauren Branning
Helen | Jo | Marie Evans | Sarah | Shrimp | Tracey | Winston 
Characters (Selected)
Peggy Mitchell | Kat Moon | Alfie Moon | Sean Slater | Ryan Malloy | Jean Slater | Charlie Slater | Danny Pennant | Zainab Khan | Andrew Cotton | Yvonne Cotton | Glenda Mitchell | Carol Jackson | Charlie Cotton | Cindy Williams Jnr | Liam Butcher | Lola Pearce | Arthur Chubb (Fatboy) | Shabnam Kazemi | Cora Cross | Lee Carter | Babe Smith | Pam Coker | Les Coker | Claudette Hubbard | Preston Cooper
Characters (Selected)
Pat Evans | Stan Carter | Archie Mitchell | Nana Moon | Lou Beale | Tiffany Mitchell | Lucy Beale | Nick Cotton | Carl White | Bradley Branning | Pauline Fowler | Arthur Chubb (Fatboy) | Ronnie Mitchell  | Roxy Mitchell   | Sylvie Carter  | Paul Coker
Actors Danny Dyer | Shane Richie | Adam Woodyatt | Steve McFadden | Mike Reid | Thomas Law | Neil McDermott | Charlie Clements | John Bardon | John Altman | Peter Dean | Perry Fenwick
Actresses Barbara Windsor | Laurie Brett | Lacey Turner | Anita Dobson | Jacqueline Jossa | Rita Simons | Samantha Womack | Tameka Empson | Wendy Richard | Anna Karen