Undercover lovers!

Kendall Jenner and boyfriend A$AP Rocky made their public debut as a couple at the Met Gala on Monday, but apparently they've been together for a lot longer than people think! The pair have been secretly dating for more than a year, Life & Style reports.

So how did they keep it under wraps?

"Kendall would slip into his concerts, and he's gone to her fashion shows, but they'll usually have secret meetings when he's in the studio. They also spend time hanging with their mutual friends," a source dished to the mag.

The supermodel doesn't want to share her romance with the world, unlike her sisters.

"They are not in this relationship for publicity, so they won't want a big Kardashian production for the world to see. Rocky actually keeps Kendall grounded and gives her time away from her crazy family. He is a great escape for her," the source added.

Sneaky sneaky!