Little Britain stars Matt Lucas and David Walliams are to autograph a Llanddewi-Brefi road sign in aid of the tsunami appeal.
Three signs have been stolen from the village
Councillors in the Ceredigion village made famous by the hit BBC comedy, approached the pair a few weeks ago.
One of three signs made to replace two stolen from Llanddewi-Brefi will be autographed and auctioned off online.
Lucas who plays Daffyd, the "only gay in the village," is one of the show's most popular characters.
Lucas and Walliams' publicist, said the pair were "busy" writing the third series of Little Britain, but confirmed they had agreed to help.
After becoming a mainstream hit, fans of the comedy travelled to Llanddewi-Brefi to be photographed next to the road signs.
But in recent months three signs have gone missing.
Signage firm owner Anthony Roberts, from Merthyr Tydfil, is replacing them free of charge after contacting councillors last month.
Llanddewi councillor and chairman of Ceredigion County Council Dai Evans said: "We're having three signs made, which should arrive next week.
"Two are being put in place at either ends of the village and a third will be taken down to London to be signed. It will then be auctioned off on e-Bay."
Cllr Penry James said pictures of the tsunami disaster combined with news that Llanddewi's signs had been stolen, inspired him to contact Walliams and Lucas.
Matt Lucas has made Daffyd and the village famous
"I was sitting watching pictures of the tsunami on TV and I'd been reading about Llanddewi's stolen signs when it struck me that something could be done," he said.
"I eventually contacted the comedians' publicist and they said they were willing to help."
Publicist Barbara Scharoen said Walliams and Lucas had agreed to add their signatures.
"A councillor has been in contact and David and Matt have agreed to autograph the sign. We're waiting now for the new sign to be made," she said.
Cllr Dai Evans said a civic reception would be held in Llanddewi-Brefi when the new signs arrived and hoped problems involving their security could be resolved.
"I think the county council is responsible for their security. I know the highways inspector for the area is worried about the signs being stolen again."