• Pedro Pascal proudly shared his sister Lux's magazine cover on Instagram as she comes out as a trans woman
  • The actor captioned the cover, "My sister, my heart, our Lux"
  • Lux said Pascal has been nothing but supportive since she came out to him over FaceTime

"The Mandalorian" star Pedro Pascal is proud of his younger sister, Lux, who recently came out as a trans woman.

On Tuesday, Pascal, 45, took to Instagram to sweetly show support for Lux. He shared his actress sister's cover for the Chilean magazine Ya, where she opened up about her transition for the first time.

"Mi hermana, mi corazón, nuestra Lux," the "Wonder Woman 1984" star wrote in the caption in his native Spanish, which translates to "My sister, my heart, our Lux," People reported.

Pascal's fans and followers sent messages of love and support for the actor and Lux, 28.

"How stunning, how absolutely beautiful! I'm so proud and so happy. What a queen," one commented, while another wrote, "She is a queen. Thanks for being the best brother Pedro."

"You are such a supportive brother I wish I had a brother like you," another wrote.

Lux received hormone treatment in July and has been studying acting at the famed Juilliard School in New York City. In her cover story, she said her transition was "natural" to her family and her celebrity brother was a significant part of it.

"My transition has been something that's very natural for everyone in my family. It's almost something that they expected to happen," she said in her native Spanish.

The "Game of Thrones" actor "has been an important part of this. He's also an artist and has served as a guide for me. He was one of the first people to gift me the tools that started shaping my identity," she continued.

Lux recalled that she came out to Pascal over FaceTime. Her big brother asked her how she felt because he was a little worried, and when she told him she was "happy," he quickly congratulated her. "Perfect, this is incredible," she quoted Pascal as saying.

Lux earlier came out to her loved ones as nonbinary before realizing being a woman was simpler for her. She said she hopes to become a positive representation for the trans community.

"Moving through the world as a woman is much more simple for me, but I still advocate for nonbinary identities to have a space in society," she added. "We need trans activists who are good, smart, informed and who can be strong voices against transphobia, homophobia and racism."

Pedro Pascal
LOS ANGELES, CALIFORNIA - JANUARY 19: Pedro Pascal attends the 26th Annual Screen Actors Guild Awards at The Shrine Auditorium on January 19, 2020 in Los Angeles, California. Jeff Kravitz/FilmMagic