'Batman v Superman' Wonder Woman: Gal Gadot Leaves Jimmy Kimmel Speechless [VIDEO]

Gal Gadot was not able to breathe in the first Wonder Woman costume she tried on.

Gadot, who is making her big debut as Wonder Woman in Batman v Superman: Dawn of Justice, appeared on Jimmy Kimmel Live! Tuesday night and spoke about how uncomfortable it was to wear her costume.

"I walked into this huge hangar filled with images of me as Wonder Woman, which was surreal," Gadot said. "Then they got me into the fitting room and tried on the costume. And I was so happy and so grateful for being there and doing this role that I didn't say anything about the fact it was so tight, I literally could not breathe."

Kimmel has seen the film and mentioned watching it as a comic book geek, so Gadot bluntly asked what he thought of her breasts. Kimmel was clearly taken aback, in a humorous way, so Gadot clarified:

"It was a joke, and maybe a bad one," she admitted. "I thought you were leading to the fact that a lot of comic fans had a lot to say about my breasts."

The pair also talked about the differences in costuming between Wonder Woman and Batman, who gets to wear a full, bulky suit.

"Batman and Superman - especially Batman - are more than covered. He might as well be in a gorilla costume," Kimmel quipped. "He's probably burning on the inside while you're freezing."

Gadot has bulked up pretty significantly for her new role as Wonder Woman, and the actress is happy with her new body, as she noted in a recent interview with Cosmopolitan.

"Since I've started, I've gained about 17 pounds, and it's all muscle," she told the magazine. "I feel so much better now. When you feel strong, it changes everything -- your posture, the way you walk. I look at photos from five years ago and think, Whoa, I was too skinny. It's not cool."

Batman v Superman: Dawn of Justice is scheduled for release in theaters on March 25, 2016.

Check out the clip of Gadot on Jimmy Kimmel Live! below: