Cross played the lead role of Eliza in the 2005 film Bee Season, opposite Richard Gere, Juliette Binoche and Max Minghella. She auditioned for the part shortly before moving to Argentina, where she was living when offered the role. “My manager sent the tape in, and then I was called in for an audition that was very long and very tiring,” recalls the actor. “It went on for five hours. Two weeks later I was told I got the part”.
Her next role was playing the eccentric daughter of Jennifer Jason Leigh‘s character in director Noah Baumbach‘s Margot at the Wedding. She worked alongside actors such as Nicole Kidman, Jack Black, John Turturro, and fellow teen actor Zane Pais.
Cross plays the co-starring role of Cynthia in the film “Chlorine”, written and directed by Jay Alaimo. The film also stars Kyra Sedgwick and Vincent D’Onofrio as Cynthia’s troubled parents, and Ryan Donowho as her eccentric brother.
“The performance by Flora Cross is haunting in its seriousness. She doesn’t act out; she acts in. ” Roger Ebert, Chicago Sun TImes
“When FLORA CROSS landed her first role in 2005’s Bee Season, it was alongside Hollywood heavyweights like Richard Gere andJuliette Binoche. For her role in Margot At The Wedding, an off-color domestic dramedy directed by Noah Baumbach (The Squid And The Whale), Cross shares screen-time with Nicole Kidman, Jennifer Jason Leigh and Jack Black. Not too shabby for a 14-year-old, huh?”
“With the help of clear direction and some excellent acting, especially from Flora Cross in a memorable debut as Eliza, Bee Seasonis affecting in ways that movies have all but given up trying to be.” Kenneth Turan, The Los Angeles Times
“The beating heart of the Naumann family is Eliza (the wonderful Flora Cross), a doleful beauty with bottomless eyes that flutter closed whenever she spells out a word. ” Manohla Dargis, The New York Times
“Flora Cross blooms in Season ” JANE STEVENSON – Toronto Sun 
Flora Cross is featured in Teen Vogue‘s Young Hollywood Issue.
Her first brush with the public eye occurred as an infant, when she appeared in Vogue Bambini.