One fan exclaimed, "I will NEVER get over the face that Gary Oldman's sister is Big Mo from Eastenders" while another shared their astonishment, saying: "Wrecks my head that Gary's sister is big Mo in Eastenders.
Laila Morse, who plays Big Mo, has been involved in numerous gripping storylines over the years, from her rivalry with ex-best friend Pat Butcher (played by Pam St Clement) to an ongoing love affair with the seldom-seen Fat Elvis.
Mo Harris, affectionately known as Big Mo, has been a staple of EastEnders since she first set foot on Albert Square in 2000.
Gary Oldman didn't just make a name for himself in Hollywood; he also gave his sister, Laila Morse, her acting break by casting her in his 1997 directorial debut, 'Nil By Mouth'.
As the matriarch of the Slater family, Big Mo is the grandmother to the legendary Kat Slater, as well as former characters Little Mo and Lynne.
