The trio arrived by private jet in the French capital on Saturday morning, where Paris Fashion Week is currently taking place.
"Bonjour Baby" wrote Kim next to a photo of the herself and Kanye strolling together that she posted on Instagram.
Kim wrapped up against the cold in autumnal colours and wore a brown overcoat and hat and a grey top and leggings.
The reality TV star and businesswoman was met by Carine Roitfeld, the former editor of French Vogue and the woman behind Kim's edgy pregnancy photoshoot.
Fashionable couple Kim and Kanye, who became parents on 15 June, left baby North at the hotel as they visited several top designer offices including Givency and Georgio Armani.
Carine has previously spoken out about her friendship with the famous duo.
Kim and Carine Roitfeld
Speaking at the New York premiere of Mademoiselle C, the super stylist had nothing but nice things to say about Kim and Kayne. "They are so normal," she told People. "They are lovely together."
"She was one of the easiest models I have ever worked with," Carine added of Kim. "Honestly, she was very, very nice. She made no demands at all."