Victoria Beckham is "incredibly honoured" to be working for the United Nations (UN).
The Ex-Spice Girls star wants to lend her voice to the women affected and raise awareness of the issues.
The 40-year-old fashion designer recently spent three days visiting Soweto in South Africa in her new role as UNAids international goodwill ambassador and has vowed to do everything she can to help women affected by HIV and AIDS in disadvantaged areas.
She said: "I'm incredibly honoured that the UN have invited me to become a global goodwill ambassador for UNAids.
"I want to lend my voice to the women affected by gender-based violence, HIV and AIDS and raise awareness of the issues they face and, where possible, help the communities and organisations that work so tirelessly on the ground to support these women and children."
During her visit, Victoria - who has children Brooklyn, 15, Romeo, 12, Cruz, nine, and Harper, three, with husband David - visited a Mothers2Mothers project at the Ramokgopa clinic, where mentor mothers support pregnant women with HIV and the former Spice Girls star was "moved" by the experiences of the women there.
She added to Britain's HELLO! magazine: "I was moved by the strength of the women I met. By supporting each other, they are growing stronger together, overcoming dreadful challenges to create happier and healthier futures for their children.
"As a mother, I want nothing but a happy and healthy future for my children and that's all any mother would wish for. We have to support the women in these countries and communities to offer the same for their children.
"With simple, affordable and available medication, mothers with HIV have the opportunity to give birth to HIV-free babies, creating an HIV-free generation."
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