Gary Barlow, Chris Evans, James May and Brian Cox will drive through the Midlands today in a pink Rolls Royce raising money for Breast Cancer Care.
The challenge will see them driving from Land's End to John O'Groats in a bespoke pink Rolls Royce Ghost.
They want to try and raise £1 million in 24 hours.
The four celebrities will stop off in Birmingham as part of their trip to meet breast cancer sufferers from the Midlands.
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Mild and windy with some light rain at times.
Remaining mild and rather cloudy with patchy rain. Windy.
Billie Whitelaw, who starred in films including The Omen, has died aged 82.