LONDON: Paris Hilton and her ex Doug Reinhardt have reconciled, according to new U.S. reports.

The high-profile couple split at the beginning of the summer, but friends claim Hilton is the subject of recent Twitter.com posts from Reinhardt, in which he coos about his love life. A source tells UsMagazine.com, 'They are definitely happy again.' The couple started dating at the beginning of 2009 after Hilton split from Good Charlotte rocker Benji Madden. Reinhardt recently posted a 'tweet' on Twitter.com, stating, 'What an amazing weekend with my beautiful girlfriend. I love her so much!' In a spring interview, Hilton declared she'd marry Reinhardt, explaining, 'I'm really in love and really happy.'