Kate Hudson, January Jones and Zoe Saldana have also stripped off for a good cause.
The 62-year-old actor shared the image to Instagram to highlight the importance of attending breast cancer screening.
Vicky Morgan's ads were banned by Facebook because they were deemed to contain 'adult content'.
More than two in five women also said they would be less likely to share any concerns about their breast health with friends and family, than they would have been before the pandemic.
Willis, a breast cancer survivor, admitted she debated opening up about her "embarrassing" diagnosis and urged the public to get vaccinated.
The mum-of-two underwent several rounds of chemotherapy before having both breasts removed in a bid to prevent the disease spreading.
There was little to no increase in breast cancer risk for semi-permanent or temporary dye use.
A British tourist was stunned to learn she had breast cancer after a photo opportunity at a museum picked up on the presence of a tumor.
Secondary Sisters aims to change perceptions of people living with incurable cancer and support those in the same position.
The singer's 67-year-old father is set to reveal his breast cancer battle on 'Good Morning America'.
BBC newsreader Jane Hill has resumed work after a six-month hiatus, as she reveals she's been treated for breast cancer.The presenter returned to the newsroom on Wednesday for the first time since November to present BBC News at lunchtime.Hill announced her return on Twitter, paying tribute to the NHS for diagnosing her breast cancer and treating her efficiently."I just want to say that my return wouldn't have been possible without our NHS," she tweeted."Sending love and thanks to the numerous @NHSuk staff who spotted my breast cancer, treated it, and continue to look after me. Thank you all."> Overwhelmed by so many lovely back-to-work messages. I just want to say that my return wouldn't have been possible without our NHS. Sending love & thanks to the numerous @NHSuk staff who spotted my breast cancer, treated it, and continue to look after me. Thank you all.> > — Jane Hill (@JaneHillNews) > > May 22, 2019Prior to the show, Hill tweeted that she had a "big day" ahead of her following her six-month break.On air for the first time since November. Still... six months out of the newsroom... that's been plenty of time to sort Brexit, right...?" the 49-year-old joked.Hill also quipped that her pass for the BBC building had been cancelled and so she couldn't get back into the building, adding the hashtag "welcomeback".> Big day today. On air for the first time since November. Still... 6 months out of the newsroom... that's been plenty of time to sort Brexit, right...? See you for @bbcnews at One.> > — Jane Hill (@JaneHillNews) > > May 22, 2019Hill began working part-time at the BBC in 1986, before joining the broadcaster full-time in 1991.Breast cancer is the most commonly diagnosed form of cancer among women in the UK, charity Breast Cancer Now states.More than 55,000 women are diagnosed with breast cancer in the UK on an annual basis, with one in eight women likely to develop breast cancer at some point in their lives.Approximately 350 men are diagnosed with breast cancer every year in the UK.Symptoms of breast cancer can include a change in the size, outline or shape of your breast; bleeding from your nipple; a rash on or around your nipple; and any discomfort or pain in one breast.To learn how to check your breasts for cancer symptoms, click here.If you have any questions about breast cancer, contact charity Breast Cancer Care on 0808 800 6000 to speak to a breast cancer nurse.
Women aged over 50 could reduce their risk of dying from breast cancer by eating smaller portions of meat and having one extra serving of fruit and vegetables a day.