Milana Vayntrub (the AT&T girl) posts a photo of her as a child with George Clooney. The caption is "We all have exes we're ashamed of."
Based on her views, actions, and friends I wouldn't be surprised if this were true.
https://www.instagram.com/p/B6B_0TZBubV/?igshid=1xukn4ok8uy70