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Ruby Rose is so in love!

The Orange Is the New Black star stunned at the premiere of her new film, xXx: Return of Xander Cage, at the TCL Chinese Theater in Hollywood on Thursday, showing off her multitude of tattoos in a daring ivory Julien Macdonald gown with a plunging neckline and high front-slit.

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Rose was joined at the premiere by her girlfriend, Jess Origliasso, and the Australian actress had nothing but praise for her lady love.

"She is the most amazing person," Rose shared with ET's Carly Steel. "We just jam every night. We just play music and sing and cook dinner, and she's amazing. She's wonderful."

"She's always such a [source of] moral support for me and a moral compass," she added. "I'm so glad she came tonight."

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In this latest installment in the "Xander Cage" trilogy, Rose stars as Adele Wolff, a thrill-seeking badass who works alongside Vin Diesel's titular character. Rose has received a lot of love for playing a strong female lead who's gay, which isn't exactly common among action movie heroes.

"It's special. It's unique. Those relationships exist in life everywhere, but they're not shown in cinema so much, so that was great," Rose shared. "And then you've got Toni Collette, Nina Dobrev and Deepika [Padukone], so you've got these three, four different types of women in this film."

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The 30-year-old model also dished on her upcoming role in the female-driven comedy "Pitch Perfect 3," for which she's had to brush up on her crooning skills.

"I am relearning how to sing again," Rose explained, adding that she hasn't had to do much singing "since my church choir days."

xXx: Return of Xander Cage hits theaters on Friday.