Cornish Lib Dem MP Julia Goldsworthy is to be flown by helicopter from the House of Commons on Wednesday after the Budget is announced.
Julia Goldsworthy will raise money for the Cornwall Air Ambulance
The Lib Dems' shadow chief secretary to the Treasury will respond to Gordon Brown's Budget.
Then she will be flown to take part in Channel Four's celebrity reality show The Games and the curling event at the Sheffield Ice Arena.
Ms Goldsworthy, 27, is in third place among the five women in the show.
Her participation was put in doubt after she was given the front bench job, as the show clashed with the Budget.
But the producers fitted filming around her Budget duties.
She is raising money for the Cornwall Air Ambulance.