Actor Jared Leto dedicated his best supporting actor Oscar to the millions of people who have “lost the battle to AIDS."

Leto plays an HIV-positive transgender woman opposite Matthew McConaughey in The Dallas Buyers Club.

In accepting his award Sunday night, Leto paid tribute to his mother.

“She encouraged her kids to be creative and to work hard and to do something special,” Leto said. “I love you mom and thank you for teaching me to dream.”

“To all the dreamers out there in the world watching this tonight in places like Ukraine and Venezuela, we are here. As you struggle to make your dreams happen and do the impossible, we are thinking of you tonight.”

Leto dedicated his win to “the 36 million people who have lost the battle to AIDS and those of you out there who have ever felt injustice for who you are and who you love. Tonight, I stand here with you and for you.”