The journalist Rachel Johnson has followed her father Stanley into the world of reality television, announcing that she will appear on Celebrity Big Brother.

The 52-year-old, sister of the foreign secretary, Boris Johnson, will enter the Channel 5 house when the show launches on 2 January.

She has previously presented a political headache for her brother, who led the Brexit campaign, by joining the Liberal Democrats in protest at the outcome of the referendum. She will join an all-female cast on the show, marking 100 years since women won the right to vote in the UK.

Writing about her decision in the Mail on Sunday, Johnson said her husband had asked: “Are the Johnsons the new Kardashians?”

Johnson, the first contestant to be announced, said the lineup on the show would also include female politicians.