The 'Gavin & Stacey' reunion is officially underway, as James Corden's latest tweet has revealed.

Last month, Corden announced that he and Ruth Jones had written the script for a Christmas special of the sitcom, which originally ran for three series from 2007 - 2010.

Now it looks like things are moving quickly, as the cast are already in rehearsals.

The one-off special is due to air on BBC One on Christmas Day.

In the picture shared on Twitter, the cast including Ruth Jones, Matthew Horne, Joanna Page and Larry Lambe can be seen participating in a table read.

There's no sign of Uncle Bryn (Rob Brydon) - probably because he's currently shooting the next series of 'The Trip' with Steve Coogan.

Either way, it's really occurring.