So word on the street is that Prince Harry's girl is the latest celebrity to join the no make-up selfie brigade with this snap...
So far more than £8million has been raised for the cause by woman wiping off their make-up and sharing snaps of their fresh and foundation-free faces.
We wonder if Cressy took the pic while on her ski trip to Kazakhstan with her man Prince Harry? Romantic little getaway hey guys?!
Cancer Research told the Guardian they were delighted with the success of the campaign, which they have said wasn't initiated by them.
Harpal Kumar, the charity's chief executive said: "We have been overwhelmed by the support people have been showing us through the #nomakeupselfie trend.
"We don't receive any government funding for our research and so it is phenomenal to think that the generosity of the public enabling us to fund critical research that we didn't have the money for six days ago."
More Cressida? But of course...