What's occurring became famous as the catchphrase of Nessa Jenkins in the BBC sitcom Gavin and Stacey, created by Ruth Jones and James Corden and first broadcast in 2007. Played by Ruth Jones, Nessa is from Barry in Wales and uses the phrase as her everyday greeting. The show's popularity, repeats and later Christmas specials helped the line enter everyday British speech. Clips and soundboard versions now circulate on social media, where fans use it as a shorthand hello linked to the series.