Clooney, who's had very few long-term relationships in his life, had been "creating distance" for many months, the source added. His excuse at the time? "Work. [He] was knee-deep in pre-production on a couple projects."
One of those projects was Gravity; he and costar Sandra Bullock are reportedly wrapping up that thriller in London.
Clooney famously swore off remarrying, telling Piers Morgan in January that he wouldn't walk down the aisle again after his failed union with actress Talia Balsam in the early 90s. Italian model Canalis however, seemed more invested in the institution. "I am a firm believer in marriage," she said in a June interview with Italian magazine Chi. "In the future I will be married, but for the time being I am happy as I am."