The High School Musical star has revealed she's thrilled to be taking the lead in the musical which has also been an Academy Award-winning movie of the same name.
Vanessa will perform in a four-week pre-Broadway series of shows, which start in Washington DC next year, and it's hoped the show will then move to Broadway.
"So excited to play Gigi," she told fans. "I hope you all will have a chance to see me in it when we open… I can't believe it! So excited!"
She added to The AP: "I've never been so ecstatic about a project before. I genuinely feel like a child, beaming from ear-to-ear, being taken to Disneyland for the first time. It's something that I actually feel I was born to do.
"I think, as an actor, the ultimate dream is to be on Broadway. I think it's the true test. There are no second takes. You've got to bring everything you've got for the most critical of audiences. It's an honour, if anything. I'm over the moon."
Gigi will play at the Kennedy Centre between 16 January and 12 February 2014 before heading to Broadway.
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