Ruby Rose is giving fans a first glimpse of her Batwoman costume.

The 32-year-old Australian actress shared a photo of herself as Kate Kane, aka Batwoman, ahead of the "Arrow," "The Flash" and "Supergirl" crossover.

The picture shows Rose striding forward in a black and red bodysuit with a cape and mask. The bat signal can be seen in the background.

"First look," Rose captioned the post, adding bat and heart emojis. "Crossover event December 9 at 8pm ET."

E! News said Rose's costume was designed by Colleen Atwood. Atwood previously designed the signature costumes for "Arrow," "The Flash" and "Supergirl."

The annual Arrow-verse crossover will begin production Tuesday in Vancouver, B.C., according to Entertainment Tonight.

The three-episode crossover will air Dec. 9, 10 and 11 on The CW.

Rose left Twitter in August following backlash to her casting.

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Fans objected to Rose playing Batwoman, who will be openly gay in the crossover, despite the actress being lesbian.

"Where on earth did 'Ruby is not a lesbian therefore she can't be Batwoman' come from -- has to be the funniest most ridiculous thing I've ever read. I came out at 12?" she tweeted before her exit.

Rose is known for playing Stella Carlin on "Orange is the New Black," and has appeared in the films "xXx: Return of Xander Cage," "John Wick: Chapter 2" and "The Meg."

She will return in "John Wick 3: Parabellum" in 2019.