TV presenter Gloria Huniford has appealed to women who took part in this year's Race for Life events and have yet to send in their sponsorship money.
Women and children of all ages took part in the four popular 5km events in Poole Park and Bournemouth seafront in May and June and have raised £425,209 to date.
But organisers say there are still some participants who have yet to send in their cash.
They are calling on these people to get collecting and help them reach their £635,000 target.
In a letter to those who participated in the Bournemouth and Poole events, Gloria, who is patron of Cancer Research UK's Race for Life, said: "I would like to send my personal and heartfelt thanks to each and every one of the 10,000 local women who responded to this year's invitation to walk, jog or run 5k.
"Race for Life is an event very close to my heart. It is now four years since I lost my daughter Caron, but even in this short period of time, treatments for cancer have improved so much.
"That is why Race for Life is so important because the money raised really does make a difference - making sure the brilliant scientists, doctors and nurses at Cancer Research UK can continue their vital research into the prevention, treatment and cure of all types of cancer."
She added: "So far, those taking part in the Bournemouth and Poole events have returned an amazing £425,209 in sponsorship.
"But I would just like to send a gentle reminder to those who have yet to do so to take that final step and send in their money."
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