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George Clooney was flying high at the Halloween party for his tequila brand Casamigos in Las Vegas, dressed as a pilot and posing at the controls of a private jet.

But as his business partner Rande Gerber was supported by his wife Cindy Crawford, who wore a flight attendant costume and was clearly thrilled to be part of the festivities, George’s glamorous wife Amal was nowhere to be seen – and her absence has sparked rumours there’s trouble in paradise for the couple.

“The Casamigos Halloween party is one of the biggest events of George’s year and the fact that this one was in Vegas made it all the more special,” an insider tells Woman’s Day. “They might have young kids, but Amal is usually by her husband’s side at these kinds of events. If she was at home with the kids, she won’t have been happy that George was clearly partying hard!”

Indeed, the dad-of-two, 57, was happy to let his hair down, sculling drinks with Rande, 56, and posing with model Karolina Kurkova.

“George clearly loves his kids more than anything in the world, but in some ways he’s still a big kid himself. Now that he’s a dad, Amal was probably hoping nights like this would become a thing of the past,” our insider adds.

“There are whispers that Amal is pretty horrified the whole thing got so unruly.”