Zoe Saldana

Emotional Sia music video spotlights HIV awareness

In the video for "Free Me," released Thursday, Saldana plays a pregnant woman who learns she has HIV and must be treated so she can prevent the spread of the disease to her unborn child.

Through interpretive dance, viewers then follow the woman's emotional turmoil, with an ultimately hopeful ending.

Oscar-winner Julianne Moore lends her voice as the narrator.

Has Zoe Saldana revealed Avengers 4 title?

Speaking at the Guardians Of The Galaxy Vol. 2 premiere, the actress, who plays Gamora, talked about the involvement of Guardians stars in the Avengers films.

Asked about the third Avengers film on Monday, she said: "I think the Guardians just shot their part when it comes to Infinity War.

"And we all have to go back for Gauntlet later this year."

But later on Tuesday, James Gunn, writer and director of the Guardians of the Galaxy franchise, denied Saldana had given the game away.

Zoe Saldana has Hashimoto's thyroiditis

Saldana said during an interview with The Edit that she has Hashimoto's thyroiditis.

"Your body doesn't have the energy it needs to filter toxins, causing it to believe that it has an infection, so it's always inflamed," Saldana said. "You create antibodies that attack your glands, so you have to eat clean."

Saldana's sister and mother also suffer from the disease.