Kellie stars in the award winning comedy series In The Long Run (Sky One/Now TV/Starz) as series regular Kirsty De La Croix opposite Bill Bailey and Idris Elba. Watch the trailer for series one here.
Other TV includes Call The Midwife (series 8) for Netflix/BBC and the BAFTA-winning series Joe All Alone - as series regular Stacey.
She is probably best known for playing Carly Wicks in EastEnders for BBC, clocking up over 200 episodes between 2006-2012.
Kellie played Kym in the much-loved comedy The Office - Christmas Specials written and directed by Ricky Gervais, and Violet in the 3-part BBC4 costume drama Twenty Thousand Streets Under The Sky - directed by Simon Curtis (My Week With Marylin) based on the Novel by Patrick Hamilton.