Ashton Kutcher is on the hunt for a hacker who illegally accessed his Twitter account over the weekend.
The actor's Twitter page is one of the most popular on the micro-blogging website, attracting 6.3 million followers, but his account was breached by an online prankster, and the actor was furious.
Kutcher subsequently told fans the hacker had also accessed his account on Foursquare, a program which allows cellphone users to disclose their location to friends, and the joker had inadvertently revealed where he was.
The star writes, "So apparently someone thinks they are clever hacking my account. Lame ... OK Mr Hacker, you only made one mistake. You hacked my Foursquare and I now know your address. Whoops ... This is gonna be fun."
Kutcher then posted a Foursquare image of Hawthorne, Calif., warning the perpetrator, "I'm coming for you my friend..."