Many celebrities are showing their support for World AIDS Day, a day aimed to raise awareness for HIV/AIDS.

There are currently an estimated 34 million people living with HIV/AIDS, which is transmitted through blood, semen and breast milk and does not have a cure.

Prince Harry joined in on Sentebale’s #FeelNoShame campaign to end the stigma against the disease by having famous people share a secret. The 30-year-old let people know that he has stage fright.

“I get incredibly nervous before public speaking no matter how big the crowd or the audience,” he said in the video. “Despite the fact that I laugh and joke all the time, I get incredibly nervous – if not anxious actually – before going into rooms full of people when I’m wearing a suit.”

Several other celebrities took to social media to tweet about World AIDS Day.

Apple also joined in on the fight against the disease by giving a portion of its Monday proceeds to the Global Fund to fight AIDS.

Shoppers can help by visiting Red.org and buying one of the listed products until Dec. 7.