Actress Reese Witherspoon has launched a global United Nations campaign to end violence against women.

The Walk The Line star, who is cosmetics giant Avon’s Global Ambassador to promote women’s empowerment, kicked off the beauty company’s new partnership with the United Nations Development Fund for Women (UNIFEM) on Tuesday.

Avon is selling Women’s Empowerment Bracelets online for $3 each to benefit UNIFEM.

Witherspoon said, "Every purchase of the bracelet will help empower women 100 per cent of the profits will go directly to the Avon Empowerment Fund to support UNIFEM in their work to end violence against women.

"I hope to see this bracelet on the wrists of women all around the world as a sign of solidarity and hope that one day every woman will be empowered and live a life free from violence."