'Fifty Shades' Cast Confirmed Safe in South of France, Near Nice Attacks

Jamie Dornan and Dakota Johnson had been filming there this week.

"From production: 'Production has confirmed that everyone working on location in the south of France is okay. Everyone has been accounted for and is safe and sound,'" he wrote. "Thanks for everyone's messages and concerns. Another sad day for France and the world."

The attacker has yet to be identified.

Fellow "Fifty Shades" actress Eloise Mumford also took to Instagram to post a picture of the French flag in support.

A request for comment from Universal Pictures was not immediately returned to ABC News.