The comedienne is famed for the catchphrase "Am I bovvered?" from the popular creation, but she has written scripts which would see her die dramatically.
It will be broadcast as a Christmas special for the Catherine Tate Show, which will also guest star singer George Michael.
An insider form the show told the Daily Mirror: "It's going to be Lauren Cooper RIP. Catherine thinks it's time to kill her off, and she'll be going in spectacular style."