Robert Pattinson and Kristen Stewart Tweet at Twilight, while lots of other couples have been known to meet at twilight.
They both put lots of messages on twitter every evening at twilight and for hours they both post tweet after tweet.
Pattinson refers to Stewart as Tweetie Pie after the little yellow bird in the Warner Bros cartoons Sylvester & Tweetie Pie. When asked if they both considered themselves as Twitters they send no they were both Tweeters.
Recent research has shown that there are a growing number of Twilight Tweeters on Twitter usually teenagers or people in their early twenties.