Elle Fanning assures fans she's OK after fainting at Cannes dinner party

Elle Fanning had a bit of a scare at Cannes!

On Monday, the 21-year-old actress was attending the Chopard Trophy dinner when she fainted. The Teen Spirit star was seated next to her sister, Dakota Fanning, when she collapsed and fell off of her chair, briefly pausing the ceremony and quieting the crowd, Variety reports.

According to the trade publication, Dakota helped her younger sister to her feet as Colin Firth quickly offered his assistance and Marion Cotillard sat with her hand on her heart nearby. The Fanning sisters were led out of the event by security, reports Variety.

Though it was likely a scary moment for Elle, she later took to Instagram to assure fans she was OK and blamed the incident on both her period and her snug dress.

"Oops, had a fainting spell tonight in my 1950’s Prada prom dress but it’s all good!! #dresstootight #timeofthemonth," she wrote alongside a smiling selfie where she's giving a thumbs up.

The stunning dress that Elle highlighted as the culprit was a nude, vintage, tulle gown by Prada. Elle, who's serving as a juror at this year's festival, finished her elegant look with Chopard jewels and Giuseppe Zanotti heels.

Elle does seem to have fully recovered, as she was spotted leaving her hotel on Tuesday morning looking happy and healthy in a blue-and-white dress and jacket. She was also on hand to see the president of this year's jury, Alejandro Gonzalez, be awarded with the Commander of the Order of Arts and Letters.

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Cannes 2019: Day 7
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Cannes 2019: Day 7
CANNES, FRANCE - MAY 20: Dakota Fanning attends the The Chopard Trophy event during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Daniele Venturelli/WireImage)
CANNES, FRANCE - MAY 20: Dakota Fanning attends the The Chopard Trophy event during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Daniele Venturelli/WireImage)
CANNES, FRANCE - MAY 20: Elle Fanning attends the Official Trophee Chopard Dinner Photocall as part of the 72nd Cannes International Film Festival on May 20, 2019 in Cannes, France. (Photo by Pascal Le Segretain/Getty Images for Chopard)
CANNES, FRANCE - MAY 20: Elle Fanning attends the The Chopard Trophy event during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Daniele Venturelli/WireImage)
CANNES, FRANCE - MAY 20: Livia Giuggioli and Colin Firth attend the The Chopard Trophy event during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Daniele Venturelli/WireImage)
CANNES, FRANCE - MAY 20: Eva Longoria attends the The Global Gift Initiative event during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Mike Marsland/WireImage)
CANNES, FRANCE - MAY 20: Marion Cotillard attends the The Chopard Trophy event during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Daniele Venturelli/WireImage)
CANNES, FRANCE - MAY 20: Isabelle Huppert attends the screening of "Frankie" during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Gisela Schober/Getty Images)
CANNES, FRANCE - MAY 20: Chloe Sevigny attends the Official Trophee Chopard Dinner Photocall as part of the 72nd Cannes International Film Festival on May 20, 2019 in Cannes, France. (Photo by Pascal Le Segretain/Getty Images for Chopard)
CANNES, FRANCE - MAY 20: Marion Cotillard attends the screening of "Le Belle Epoque" during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by George Pimentel/WireImage)
(From L) Portuguese actor Carloto Cotta, Belgian actor Jeremie Renier, French actor Pascal Greggory, US filmmaker Ira Sachs, French actress Isabelle Huppert, British actor Ariyon Bakare, Brazilian screenwriter Mauricio Zacharias and French-Tunisian film producer Said Ben Said pose as they arrive for the screening of the film "Frankie" at the 72nd edition of the Cannes Film Festival in Cannes, southern France, on May 20, 2019. (Photo by CHRISTOPHE SIMON / AFP) (Photo credit should read CHRISTOPHE SIMON/AFP/Getty Images)
CANNES, FRANCE - MAY 20: (L-R) Jean Dujardin, Marion Cotillard and Gilles Lellouche attend the screening of "Le Belle Epoque" during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Marc Piasecki/FilmMagic)
CANNES, FRANCE - MAY 20: Diego Luna attends the Official Trophee Chopard Dinner Photocall as part of the 72nd Cannes International Film Festival on May 20, 2019 in Cannes, France. (Photo by Pascal Le Segretain/Getty Images for Chopard)
CANNES, FRANCE - MAY 20: Alejandro Gonzalez Inarritu attends the The Chopard Trophy event during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Daniele Venturelli/WireImage)
CANNES, FRANCE - MAY 20: James Norton attends the The Chopard Trophy event during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Daniele Venturelli/WireImage)
CANNES, FRANCE - MAY 20: Natalia Vodianova attends the Official Trophee Chopard Dinner Photocall as part of the 72nd Cannes International Film Festival on May 20, 2019 in Cannes, France. (Photo by Pascal Le Segretain/Getty Images for Chopard)
CANNES, FRANCE - MAY 20: (l-R) Monia Chokri, Nancy Grant and Anne-Elisabeth Bosse attend the The Chopard Trophy event during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Daniele Venturelli/WireImage)
CANNES, FRANCE - MAY 20: Guan Xiaotong attends the Official Trophee Chopard Dinner Photocall as part of the 72nd Cannes International Film Festival on May 20, 2019 in Cannes, France. (Photo by Pascal Le Segretain/Getty Images for Chopard)
CANNES, FRANCE - MAY 20: Maimouna N'Diaye attends the Official Trophee Chopard Dinner Photocall as part of the 72nd Cannes International Film Festival on May 20, 2019 in Cannes, France. (Photo by Pascal Le Segretain/Getty Images for Chopard)
CANNES, FRANCE - MAY 20: Giulia Lupetti attends the screening of "Frankie" during the 72nd annual Cannes Film Festival on May 20, 2019 in Cannes, France. (Photo by Gisela Schober/Getty Images)
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When she returns from Cannes, Elle will likely be in full-on promotion mode for her upcoming flick, Maleficent: Mistress of Evil, which she stars in alongside Angelina Jolie and Michelle Pfeiffer. ET's Katie Krause caught up with Elle last month and she gushed about working with the "amazing" cast of the film, and praised Pfeiffer specifically.

"What's so funny [is]... she was in I Am Sam with my sister [when] my sister was really young, so my mom LOVES Michelle Pfeiffer. She was like, 'She was so nice to us!'" Elle said of the 2001 film that starred her older sister. "My sister was super young, just starting out and, like, that made, like, a huge impression on my family."

Maleficent: Mistress of Evil hits theaters on October 8. 

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