The TV presenting duo have been friends for almost 30 years but have never celebrated Christmas together.
Likenesses of Ant and Dec appear to be a common sight now in the Welsh town of Abergele.
The animal charity said the show had incidences where animals had been killed 'for no other purpose than entertainment'.
The TV hosts have swapped early morning starts in the Australian jungle for night shoots in the spooky Welsh castle – heading home after midnight.
The 20th series of the show hit screens on Sunday under slightly different circumstances from usual, with contestants setting up camp in Wales rather than the Australian jungle.
The Geordie presenter made fun of campmate Hollie Arnold after she introduced herself as an 'MBE'.
The humorous video saw production censor the castle as Dec warned they weren't allowed to show it yet while Ant was keen to give fans an exclusive look.
Hosts Ant and Dec will be tested every three days and must wear 'proximity buzzers' reminding them not to get too close to others.
ITV have confirmed a contestant set to take part in the upcoming series of I’m A Celebrity…Get Me Out of Here has tested positive for COVID-19
The SM:TV gang have shared a sneak peek of their reunion, 18 years on from the ITV morning show's final show.