Mo Harris, better known as Big Mo, has been a big part of EastEnders since arriving on Albert Square in 2000.The matriarch of the Slater clan, Big Mo is grandma to the iconic Kat Slater, as well as former characters Little Mo and Lynne.
Played by Laila Morse, Big Mo has had plenty of juicy storylines over the years, from her feud with former bestie Pat Butcher (Pam St Clement) to an ongoing romance with the rarely seen Fat Elvis.
In recent years, Big Mo has mellowed, and now mostly pops up to make cheeky quips or sell some dodgy goods to Walford's residents.
Most recently, we've seen Big Mo trying to solve the mystery of who attacked Cindy on Christmas Day, dubbing the attacker the 'Walford Whacker'.
Read more on ok.co.uk