The 36-year-old reality star gushed about the 39-year-old rapper and designer's new collection after attending West's Season 5 show at New York Fashion Week.
"So proud of my baby for his amazing show today! It was so good! I'm so SO proud of him!!! #yeezyseason5," she tweeted to her 50.1 million followers.
Kardashian wore a burgundy top with matching sweatpants and jacket to the secret show at Pier 59 Studios. Her half-sister Kylie Jenner, Vogue editor-in-chief Anna Wintour and model Hailey Baldwin were among the other stars in attendance.
"Kanye tried to keep as much media out as possible, and the crowd was mostly fashion buyers and Kanye's friends and family," a source told Us Weekly.
The Keeping Up with the Kardashians star shared a video on Snapchat of models on the runway and a photo of herself and West backstage. The couple married in 2014 and share 3-year-old daughter North and 1-year-old son Saint.
West's show marked a rare outing for Kardashian, who has kept a low profile since being robbed at gunpoint Oct. 2 in Paris. The star testified about the incident for a second time this month in New York.
"Kim spent a second day with Paris investigators for her robbery case. It's mentally exhausting for her to rehash all the details of that awful morning, but she wants the people responsible to get punished," an insider told People.
"The robbery was traumatizing for Kim. Even months later, it still affects her every day life," the source said. "She wants to get some kind of closure."