Ralf’s character died in the 7th series after he won a competition to go shark-jumping in Hawaii.
The show continued for three more seasons until 2011.
However, Sheridan, who is currently presenting TV show Pooch Perfect, left in series eight, as did Kathryn, star of Netflix smash hit show Bridgerton.
On their podcast, the Ralf and Will did not reveal the news but said there would be something special happening this weekend.
“We are raising a glass to 20 years of Two Pints this week and we’re going to do something for you, so hopefully you’ll like it.
“Watch this space you’ll see it this weekend,” Will told listeners.