London, Aug 2 - Socialite heiress Paris Hilton has reunited with her ex-boyfriend Doug Reinhardt who is posting messages about their relationship on the social networking website.

The couple split at the beginning of this summer, they are together now and friends claim Hilton is the subject of the recent messages that Reinhardt has posted on Twitter.com. He raves about his love life in the posts, reports imdb.com.

'They are definitely happy again,' said the source.

A recent post by Reinhardt on Twitter.com read: 'What an amazing weekend with my beautiful girlfriend. I love her so much.'

The couple started dating at the beginning of 2009 after Hilton split from rocker Benji Madden. In an interview, Hilton declared she'd marry Reinhardt, saying: 'I'm really in love and really happy.'