The Monuments Men star wed lawyer Amal at a ceremony in Venice, Italy in September (14) after a whirlwind romance, and they headed off on a romantic honeymoon in the Seychelles.

However, Clooney has now revealed he had to break off their post-wedding relaxation to attend a convention for sci-fi fans in the U.S. - and his new wife was not best pleased.

He tells U.K. talk show host Graham Norton, "I got the call while on my honeymoon and was told it was really important that I fly in. First I had to explain that to my wife, which didn't play well. And then, the whole idea of spending part of your honeymoon with people dressed up like Captain Kirk and Star Wars characters somehow wasn't easy to explain to my new bride. But, I showed up and it was actually fun."