Sometimes the excitement of Comic-Con can make a girl want to chop her hair off -- just ask Cara Delevingne!

Fourty-five minutes before the panel for her new film, Valerian and the City of a Thousand Planets, the 23-year-old actress decided it was time for a fresh cut, right there and then.

WATCH: Cara Delevingne Shows Off Pink Hair at Girlfriend's Concert in Montreal

The former model teased her followers on Instagram with a shot of her golden locks on the floor of her hotel room.

And just before the panel, Delevingne stepped out rocking a cute shoulder-length cut.

ET's Ashley Crossan got a chance to catch up with the actress and Valerian co-star Dane DeHaan pre-panel, where they dished on her new look.

"I did it," DeHaan joked, after Delevingne revealed she went for the big chop this morning.

"I cut his hair too. We do each other's," she added.

And while the Paper Towns star cut a few inches off, she knows it's not enough to roam around the convention floor undetected. "[I'll be] wearing a Where's Waldo outfit," she confessed. "That's what I'm going to wear."

Valerian and the City of a Thousand Planets is set to release July 17, 2017.

WATCH: Batman Makes His First Cameo in New 'Suicide Squad' Trailer

Coming up, you can see Delevingne as Enchantress in Suicide Squad, in theaters on Aug. 5.

Check out a teaser below.

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