The presenter had to step in as a contestant after a celebrity baker fell ill.
Changes have apparently been made to the original show to "better reflect the changes in the cultural landscape over the last 20 years".
Matt had to get his apron on after one of the stars due to take part in the new Stand Up To Cancer series was forced to pull out at the last minute.
The line-up of guest judges is already looking like the most iconic yet.
The presenters were mortified to have fallen for the Bake Off host's story about the hit BBC police drama.
He celebrated One Day More of Donald Trump with a show-stopping musical parody.
Christopher Biggins, Matt Lucas and David Walliams were among the guests.
The I'm A Celebrity host had viewers howling with his impersonation of the PM.
Here's what Paul Hollywood, Matt Lucas, Prue Leith and Noel Fielding looks like back in the day.
Matt Lucas Resurrects Boris Johnson Impression To Lambast PM’s Delayed Press Conference On Second Lockdown
Other stars including Jason Manford and Richard Osman were similarly unimpressed.