Kim Cattrall has revealed that her missing brother has been found dead.

The Sex And The City star made an appeal on Instagram this weekend to help find her brother Chris Cattrall, 55.

"It is with great sadness that myself and my family announce the unexpected passing of our son and brother, Chris Cattrall," the actress said on Instagram.

The stunned star asked for privacy as she and her family come to terms with the tragic news.