Lyle Shelton, the face of the "No" campaign during last year's same-sex marriage plebiscite, is preparing to run for parliament.

Mr Shelton stood down as head of the Australian Christian Lobby this morning, and is expected to announce he is joining the Australian Conservatives tomorrow.

"I do believe politics needs a Christian influence from the inside," Mr Shelton said.

Lyle Shelton has resigned from the Australian Christian Lobby. (Youtube)

"I'm not leaving the battle for the values that you and I hold dear, just simply going to a different part of the battlefield.

Australian Conservatives leader Cory Bernardi will be in Mr Shelton's home town of Toowoomba tomorrow and is expected to make the announcement there.

The pair worked side-by-side during the same-sex marriage plebiscite, with Senator Bernardi praising Mr Shelton on numerous ocassions.



No specifics have been outlined for Mr Shelton's political bid, although sources from both major parties believe he will run for a seat in the Senate.

Mr Shelton will move from Canberra to his home state of Queensland to prepare for the next federal election.