Celebrities react to Bastille Day terrorist attack in Nice

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Stars took to Twitter to share their thoughts and prayers on the terrorist attack that left 84 dead Thursday night in Nice, France.

A father and son from Texas and 10 children are among the people murdered when a terrorist plowed an explosives- and weapons-laden truck into a crowd of thousands gathered along a seaside promenade in Nice to watch the city's Bastille Day fireworks.

Singer Rihanna was in Nice at the time of the attack and confirmed she was "safe" while cancelling her Friday night concert.

The cast of the "Fifty Shades of Grey" sequel was also in Nice yesterday. Producer Dana Brunetti confirmed the cast and crew were safe.

"Back safe in my hotel room. Thanks for everyone's concern and messages," Brunetti tweeted. "As far as I know everyone from our cast and crew is safe. Thanks for everyone's concern."

The Associated Press contributed to this report.