Victoria Beckham recently skipped the opening of her flagship store in London to deliver an inspiring speech about children with HIV at the United Nations General Assembly.

On Thursday, September 25, the former Spice Girls member spoke in front of thousands of attendees and stressed the importance of babies being born healthy and HIV-free, according to the Huffington Post.

Also on the same day, the UNAIDS announced that Beckham is their newest international goodwill ambassador.

"It's taken me to get to 40 to realize I have a responsibility as a woman and as a mother. I'm not going to sit here and pretend to know everything right now, I don't. I'm learning," she said.

Beckham also addressed the Executive Director of UNAIDS, Michel Sidibe in her speech, US Weekly reported.

"I'm looking forward to working closely with you and your team at the U.N. I work closely with the Elton John AIDS Foundation as well as mothers2mothers. I'm a mother, I'm a woman and I want to reach out and help as many women and mothers as I can. Babies should not be born with HIV," she said.

The mother of four also revealed how her passion to help raise awareness for the cause increased, the NY Daily News noted.

"I recently visited South Africa and was so touched by the women I met and felt inspired. I came home and I knew I had to do something," she explained.

Meanwhile, Sidibe released a statement on behalf of UNAIDS and said, "I dream of a generation free from HIV and I know that Victoria's support will help up to achieve this shared goal. Her creativity, innovation and outreach will amplify our efforts and bring us one important step closer towards ending the AIDS epidemic."

Following her successful speech, Beckham posted a photo of herself with a certificate from the UNAIDS.

She wrote, "Proudly accepting the role of @UNAIDS goodwill ambassador #UNGA x vb."