Courteney Cox, Daughter, Coco, Instagram

Instagram / Courteney Cox

Wanna feel old? Courteney Cox and David Arquette's little baby is all grown up and...going to her first formal dance.

The 55-year-old Friends alum posted on her Instagram page on Saturday night a photo of her and her ex's 15-year-old daughter Coco Arquette, their only child together, sporting a low-cut, sleeveless red ruched mini dress. She also shared alongside the pic a black and white image of herself posing in a white dress over a black mock turtleneck and carrying a bouquet of flowers.

"Our first formals!" Courteney wrote. "I'm not saying times have changed but, someone is a little more 'formal' than someone else. Obviously it was a little chillier in Alabama. #simplicitypatterns."

The actress was born and raised in Birmingham, Alabama.

"My love, is that a turtleneck???" commented Courteney's former Cougar Town co-star, Christa Miller.

"A stylish mock," Courteney replied.

"That is one for the books baby," commented Allison Janney.

"❤️❤️❤️❤️," wrote Kate Hudson.

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Coco later shared on her own Instagram page photos of her and her girlfriends posing in their formal dance attire inside a home.

"Formal pictures but make it self timer," she wrote.

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