Kim Kardashian mistakes Tracee Ellis Ross' 50th birthday dinner for costume party

Kim Kardashian is known for always bringing it to any event, so when she was invited to Black-ish star Tracee Ellis Ross' 50th birthday, the reality star went above and beyond to bring the fiercest look to the party. But unfortunately for The Kardashians star, she made a slight mistake on the theme of the party.

During Halloween weekend the SKIMS founder dressed as Mystique from X-Men, and while her look was definitely eye-catching when she attended Tracee's birthday dinner, she learned it was for the wrong reasons. Taking to Instagram, Kim Kardashian revealed she had made a fashion faux pas.

"That time I showed up to a birthday dinner in full costume when it wasn't a costume party!" Kim captioned a photo of herself dressed as Marvel heroine Mystique alongside Ross wearing an elegant crimson party gown. "Happy Birthday to the most beautiful kind soul @traceeellisross."

Later, the business mogul uploaded a gallery of images showing her dressed as Mystique alongside the simple message "Happy Halloween."