Paul has joined a campaign to end cosmetic testing on animals around the world after the practice was banned in Europe.
A new law prohibiting companies from testing beauty products on animals came into action across the European Union in March, following years of campaigning by officials at Cruelty Free International (BUAV).
Now the group has joined forces with the Beatles legend to demand that the ban is rolled out internationally.
McCartney says, "I have supported Cruelty Free International's founding organization, the BUAV over the years with its campaign to end cosmetics testing on animals. I am so proud to be part of this historic event and congratulate Cruelty Free International for succeeding in taking the cruelty out of beauty across the European Union.
"Together we have made a huge difference, yet animals continue to suffer because over 80% of the world still allows cosmetics testing on animals. I am now supporting Cruelty Free International with its campaign to seek a global ban to ensure that animals do not suffer for the sake of beauty anywhere in the world."