Simon Pegg and Twitter have "grown apart".
In a blog post titled 'As Paul McCartney once said, hello, goodbye', Simon, 44, explained: "I haven't been enjoying it for a while now. There hasn't been a specific incident and the reasons are various.
"Ultimately, I think we've just grown apart. What I'm saying is, it's not you, its me (sic).
"To those of you, who have regularly sent me messages and supported me, I say thank you and please be in no doubt you are appreciated and valued.
"Your creativity, passion and positivity is always inspiring. In the meantime, I'm going to concentrate on the real world and keep working hard. There's a lot of really fun stuff coming up and there is still every chance you will be sick of me, in no time at all."
Simon, who recently starred in 'Hector and the Search for Happiness' and is currently filming 'Mission: Impossible V', added: "Take care Tweeple and remember to use your powers for good."