Shane Warne 'romances ex at Wimbledon'
According to The Daily Telegraph, onlookers described the pair as "the picture of a happy couple" as they watched Roger Federer and Andy Roddick compete for the grand slam title.
Warne and Callahan, who have three children, separated in 2007 after he sent incriminating text messages meant for another woman to his wife. Callaghan had previously broken up with Warne after he admitted to affairs in 2005. At the time, she told Australian magazine New Idea: "I'm angry that I was fooled."
The pair didn't wait to see the outcome of the tennis final, leaving Centre Court before the end of the game.
Warne flew into the UK from Las Vegas, where he has been taking part in the World Series of Poker.