The 47-year-old star, who is reprising the role of the secret agent for the new Sam Mendes-directed movie, revealed on a chat show it was fun doing the teasing scenes with Harris.
"There is a great working relationship, that's a big flirt. It's great to play and Naomie does it brilliantly," he said.
Craig also confessed he could not envision himself being friends with a real-life Bond, but admitted he'd be good company at a party.