Seth Rogen is hunting an internet impostor who has been posting fake messages on social networking website Twitter.com.
Thousands of fans have 'befriended' the Knocked Up star on the website - which allows users to interract with the public.
But Rogen insists it's not him.
He says, "That's not me on Twitter. I have never partaken in any social networking avenue on the internet. I'm not on Facebook, I'm not on MySpace. I'm especially not on Twitter. But apparently there is a fake me on there.
"It's so a world I don't have anything to do with. I just think it's bulls**t. Go out there and talk to people."
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