It was the first time the two have been seen together in public for several months.
The occasion was the official opening of Quentin Tarantino's new war film, "Inglourious Basterds."
The violence-filled offering has Pitt in command of a squad of German-speaking Jewish soldiers bent on wreaking havoc in Nazi-occupied France.
"I got up the next morning and saw five empty bottles of wine lying on the floor. Five. And something that resembled a smoking apparatus, I don't know what that was about and apparently I agreed to do the movie because six weeks later I was in uniform and I was Lieutenant Aldo Raine," said Pitt.
With dialogue in English, French and German, the movie has received mixed initial reviews.
"You're back at Cannes, which matters, more the prize or the public acclaim, which matters more, the prize or the public?" asked CBS News correspondent Allen Pizzey.
"Can't I have both?" Tarantino replied with laughter.
The 62nd Cannes Film Festival is a little lower on the glitz and glitter level than many of its predecessors.
There's no prize here for public acclaim, but if there was, no prizes for guessing the winners this year.