Broadcaster Esther Rantzen has confirmed she would stand for election in Luton if the current MP stood again.
Ms Rantzen previously said she was considering standing after it was disclosed Labour MP Margaret Moran claimed £22,500 for treating dry rot at her home in Southampton, 100 miles from her constituency.
The I'm a Celebrity... and That's Life star, 68, confirmed she would definitely stand if Ms Moran stood again.
The MP has been referred to the special NEC endorsements panel for urgent consideration about whether to remove her endorsement as a Labour Party candidate.
Mahmood Hussain, chairman of Luton South Labour Party, said they were waiting for a decision from the NEC regarding Ms Moran's future before they issued a statement.
Ms Rantzen said: "I am absolutely shocked by an opaque process where nobody, nobody in Westminster, nobody in Luton South knows what's happening with Margaret Moran and I think that's a symptom of what is wrong with our current attitude.
"I think certainly the people in Luton South deserve to know, knowing how she claims her allowances, what the Labour Party intends to do. So I can't tell you at this moment whether or not she will be deselected, but if she stands, I will stand."
Ms Rantzen said even if Ms Moran did not stand, she may still consider standing for election, "to give the voters in Luton South a choice".
But Ms Rantzen's idea to stand last week raised concerns among potential rivals in Luton. Nigel Huddleston, Conservative Party prospective parliamentary candidate for Luton South, said if the TV presenter stood it could split the anti-Moran vote and risk Labour winning again.
Former pop singer and fellow I'm a Celebrity... star David Van Day announced he too was considering standing as an MP in the wake of the recent expenses scandal. The 52-year-old former member of 80s' pop duo Dollar may put himself forward as a candidate against Mid Bedfordshire MP Nadine Dorries.
