Breast Cancer Campaign and Breakthrough Breast Cancer will now be called Breast Cancer Now with a new logo after they have merged as one.
The new name for the charity was formed in April but will be announced to the wider public through the launch of its first television advertising campaign under the new brand.
A statement from Breast Cancer Now said, "The charity's name conveys the urgency required to stop women in the UK dying from breast cancer, with its mark representing the endeavor, dedication and hearts of the supporters and researchers behind the charity's life-saving work."
The announcement about the charities merging together was done in November. Together, they have 212 staff and a combined income of £28.3million.
Fiona Hazell, Director of communications and engagement at BCN, said the announcement of the name would start a new era for the charity. "We have the brightest scientific minds across the UK already working hard behind the scenes to discover how to prevent breast cancer, how to detect it earlier and how to stop it taking lives," she said.
"We want everybody who's been touched by breast cancer to join us, to stop lives being lost to this terrible disease for good."
Samia al Qadhi, Chief executive of Breast Cancer Care, a separate charity, said, "It is exciting news that Breakthrough Breast Cancer and Breast Cancer Campaign have now merged and launched as one charity. As Breast Cancer Now they will help advance medical research. We look forward to working with our sister charity as it makes breakthroughs, while we continue to support people as they face breast cancer."