Actor Abhishek Bachchan feels honoured to have co-hosted the amfAR (The Foundation for AIDS Research) dinner with Hollywood star Sharon Stone.

The `Bol Bachchan` star co-hosted the dinner with his actress-wife Aishwarya Rai and the `Basic Instinct` actress in Mumbai Sunday. He took to Twitter to express his happiness.

`What an honour to co-host the amfAR India dinner with Sharon Stone and Aishwarya. amfAR is doing great work. Needs your support guys,` Abhishek tweeted early Monday morning.