The Oscar-winning director dismissed rumours that the French first lady clashed with cast and crew during the shoot for Midnight In Paris, according to The AP.
"She was no problem at all," he said. "I was delighted with her."
The Annie Hall filmmaker also refuted recent press claims that Bruni-Sarkozy's scenes would be excised from the final cut of the movie.
"This is a hundred per cent untrue," he said. "She's in the picture. Everything she shot is in the picture. I love her."
He continued: "She's great. It's not a big part, but it's a respectable part. Everything was totally made up."
Allen added that he is distressed by the media attacks that the French first lady has suffered in recent months.
"I'm shocked at the wild and enormously prevalent, outrageous notions that circulate about Carla on television and the print press and magazines. I'm used to celebrity journalism, and I've had my share of untrue things printed. But this one was really one of the craziest."
Midnight In Paris will debut in US cinemas in 2011.