United Kingdom, Nov. 4 -- Kim Kardashian has no idea what a jacket potato is.

The 45-year-old reality TV star was left visibly confused when asked about the British food staple during a radio interview that left her co-star Sarah Paulson, 50, in stitches.

Their exchange took place on Capital Radio, where the pair were being interviewed by internet personality Margie, better known as Grime Gran, as part of the press tour for their new Hulu legal drama All's Fair.

Grime Gran, an 89-year-old interviewer from East London who became an online sensation for her chats with grime artists, quizzed Kim on her views about a British classic - the baked potato, known in the UK as a "jacket potato".

What followed was a moment of complete cultural m...