They play Hannah and Dan, the world’s worst brother and sister; a pair of obnoxious, lazy, self-centred, underachieving, incompetent and occasionally depraved siblings who cause chaos and disaster wherever they go.
24 year old Charlotte (represented by CAM) started out singing in classical crossover group All Angels, and stars as Oregon in Channel 4's award-winning comedy drama Fresh Meat.
Executive Producer, Simon Wilson, said: “We couldn’t have wished for two more brilliantly gifted comic performers than Charlotte and Tom to bring Keith Akushie’s hilarious creations to life.”
BBC commissioning executive, Chris Sussman, added: "The cast are brilliant. The scripts are very funny. The director is great. All we can do now is try not to mess it all up."
Joining Ritchie and Stourton as guest artists throughout the series are Stella Gonet, Tracy-Ann Oberman, Emer Kenny, Steve Brody, John Dagleish and James Lance.
Siblings is written by Keith Akushie, one of the writer's on Fresh Meat, and directed by Dan Zeff.
The six-part series is currently shooting in West London and is set to transmit in Spring 2014 on BBC Three.