Clooney, 51, apparently ate seafood pasta and drank gin-and-tonics. It is not known what Pitt ordered but he was drinking martinis, reported Contactmusic.
"They were so polite to the waitress and giggling away. They were relaxed as if it was their local restaurant, like normal people," a source said.
The Berkshire restaurant was thought to be chosen as it is close to where Pitt and Jolie are leasing a house while the actress is shooting Disney movie "Maleficent".
Clooney had recently spent time at his Lake Como, Italy home with girlfriend, former World Wrestling Entertainment star Stacy Keibler.
