'Gossip Girl' stars 'not back together'

Gossip Girl stars Ed Westwick and Jessica Szohr have denied that they are back together.

The couple, who broke up in April, were reportedly spotted together in London this week.

Gossip Cop reports that a source close to Westwick has denied a reunion, saying: "They are not back together."

During a recent interview on Radio 1, Westwick, who plays Chuck Bass on the show, was asked if he would like a girlfriend, to which he replied: "No, too much of a headache."