The Brit, 28, wore the skin-tight outfit on the red carpet at the big budget film’s premier in Mexico City.
She plays Princess Irulan, alongside Timothee Chalamet, 28, and Zendaya, 27, in the flick which is out here on March 1.
Florence said: “I’m now lucky enough to call them all my friends, which is super exciting.
“For me to be able to work with the ‘young Hollywood’ of the moment, and them being beautiful people, and then have them on my phone when I want to text them—to see that that’s the direction in which our industry is going is such a wonderful feeling.”
Florence made her big screen debut in the 2014 British drama The Falling alongside Game of Thrones star, Maisie Williams.
Last year, she split from her boyfriend Charlie Gooch.
She had been dating photographer Charlie for a year and he had been introduced to her family over the summer.
But pals said work pressures on Florence, who starred in Oppenheimer, Don’t Worry Darling and Dune in recent years, led to her calling time on their relationship.
A source revealed at the time: “There are no hard feelings between them.”