Blair, who became a patron after her aunt died of the disease, is one of the faces lending her support to the charity.
"I wish my aunt had known about the charity when she noticed a change in her breast that turned out to be breast cancer. She may have sought medical advice sooner if she knew about Breast Cancer Care's confidential information and support helpline," Blair said.
Other famous personalities lending their faces to the campaign include patron Geri Halliwell and Joan Bakewell. Celebrity supporters also include Denise Lewis, Jerry Hall, Denise Van Outen, Zoe Ball, Alison Steadman, Lorraine Kelly and Meera Syal.
The "Strength through Support" campaign will consist of TV, press, online and fundraising activity, and is targeted primarily at women over the age of 50, because 80% of breast cancers occur in women in this age group.
The 40-second ad campaign, to be aired for the first time on March 14, has been directed by award-winning Mike Leigh, who was recently nominated for an Oscar for the film 'Vera Drake'.
It features all 10 women talking to camera, linking their speech from one to another and referring to Breast Cancer as if it were a person: "If it were to choose, no one would be allowed to talk about it"... "it would love people to lose their self-worth" ending on the statement "Breast Cancer wouldn't exist... nor would this telephone number... nor would this website."
The spot will run on terrestrial and satellite TV including ITV, Channel 4, Five, UK Gold, Sky channels and Discovery Health. It will be shown predominantly in daytime schedules to appeal to the target audience and ensure the Breast Cancer Care's helpline and website can cope with any increased uptake in calls.
QVC, the charity's official broadcaster, is giving three weeks of free ad space to the campaign, which is also targeting national newspapers and women's consumer magazines. High street women's fashion store Dorothy Perkins is also supporting the campaign by providing in-store poster space in all fitting rooms.
A microsite is being launched on March 4 and will include the TV ad, photos and quotes of all the celebrities involved in the campaign and details of how to support the charity.
Breast Cancer Care has produced a new fuchsia pink wristband, with the words "Support Knowledge Strength", to support the fundraising element of the campaign. The band costs 拢1 and can be ordered on the or bought from Dorothy Perkins.
So far, 250,000 wristbands have already been ordered online and a host of celebrities have been photographed wearing the band, including Sharon Osbourne, Jodie Kidd, Jessie Wallace and Elisabeth Jagger.
Samia al Qadhi, joint chief executive of Breast Cancer Care, said: "People touched by breast cancer or with a breast health concern need to know there is help available and that Breast Cancer Care is there to support them."
The campaign was conceived, written and art directed by Simon Dicketts, executive creative director at M&C Saatchi, with media buying thorugh Total Media.
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