West was a surprise guest at the debut of Kardashian's Belle Noel range at The Bay's flagship store on Friday, reported Showbizspy.
"She showed up and looked stunning. Everyone was so excited to see her. And then everyone went wild when Kanye West showed up.
"No one knew he was coming. It was a total surprise and everyone loved it. We were shocked and thrilled when he walked in. They look very happy together, very sweet. They're the real deal for sure," a source said.
Kardashian married basketball player Kris Humphries last year, but the relationship lasted only 72 days, after which they filed for divorce.
Kardashian and West have been picture together on various occasions and have also sparked rumours about wedding plans. The reality TV star was also spotted wearing earrings spelling out Kanye West's initials.