George clooney hooked up with his ex girlfriend, Croatian model Monika Jakisic while they were in London. And according to Us Weekly, they haven't stopped talking ever since and even had a slumber party over at George's place.
"They spent hours talking, and have an incredible connection," says the insider. The sexual tension had been building for a while. Back in May, the London-based stunner, 33 -- known as the "Croatian Sensation" -- and the Gravity actor unabashedly flirted at London nightclub Loulou's.

Though he was still dating Stacy Keibler at the time (they split in July after two years of dating), "they danced and held hands," adds the source. "He's been calling and texting her ever since."
That's the reason why Stacy had to go?