George Clooney and Sandra Bullock rode side by side in water taxis while heading to the Venice Film Festival in Italy today. George was joined in his vessel by close pal Rande Gerber, and Sandra had a tiny passenger in her son, Louis, whom she cuddled with during their time on the water. Sandra and George are both overseas for the big event to debut their new film, Gravity, in which they play astronauts who become stranded in space after their shuttle is damaged. Sandra talked up the sci-fi drama at Comic-Con last month and revealed that her resources were actual astronauts, whom she called and emailed in space. She also spoke about her costar, who is a notorious on-set prankster, saying, "[George and I] had a truce from the very get-go because that just wasn't the appropriate place to prank someone."