The Britain's Got Talent judge is currently in Monaco and met the SATC star while at a very glitzy charity gala, held by eco campaigners The Climate Group.
Amanda, who was dressed in a tight white dress, managed to grab Kim - who played Samantha Jones in the hit show - for a chat and a selfie.
Posting the picture online, Amanda described Kim as her "heroine".
She told her followers: "Met my heroine tonight! @KimCattrall #sametribe."
Amanda is currently gearing up for the new series of BGT and stars alongside her cute daughter Hollie in the new trailer, which was released yesterday.
BGT is rumoured to be returning to ITV1 next month.
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