I never dress up for dinner parties; I put on my tracksuit or my pyjamas. A good dinner party is about sleeping off your food in front of a film”.

The 32-year-old star also claimed she never drinks alcohol at home – but loves to indulge in her favourite tipples when out socialising.

She told The Times newspaper: “When I go out I binge drink but I would never drink alcohol at home – it would just be Diet Coke.”

She continued: “I don’t really have any famous friends; it’s just my family, friends and all their kids.”

Katie also revealed that she is happier playing board games than going to a celebrity party.

She added: “We play Balderdash or Articulate or watch a movie in the cinema room.”