Actress Jennifer Love Hewitt appears to have enough of the social networking site.

Jennifer Love Hewitt has posted a series of messages on Twitter revealing she is fed up with all the negativity on the site and has decided to quit tweeting.

She wrote: "Unfortunately with all the negativity people choose to send on twitter as well as threats to their own well being. I'm sad to say twitter is... No longer for me

"I have enjoyed all the kindness and love that came my way, as well as support. But this break is needed.

"Life should be filled with positivity and holding each other up, not making threats and sending bad vibes. To those of you who made it a joy… Thank you from the bottom of my heart."

There has been no indication of a specific incident that has led to the star leaving the micro-blogging site and, with her account still open, it is yet to be determined if she has quit for good.