Kendall Jenner Is Totally Cool With Being Gigi Hadid And Joe Jonas' Third Wheel

They say "two's a party, three's a crowd," but not when you're Kendall Jenner, Gigi Hadid and Joe Jonas.

The 19-year-old reality star joined her model BFF and Jonas -- the current young couple of the moment -- in the Emirates Airline suite to watch the Williams' sisters match during the U.S. Open on Tuesday.

The trio took in the action from the stands, cheering on the sisters as they played. And even though Jenner was totally third wheelin', she didn't seem to mind at all. (She's a Gretchen Wieners-level "good friend.") Jenner was photographed embracing Hadid in a friendly hug, whispering sweet nothings into her ear and even chatting it up with Jonas. And we all know how important it is for boyfriends to get along with best friends. (Thanks for teaching us that important life lesson, Spice Girls.) G.I. Joe, as they're called, thankfully made things easy for Jenner and seemingly kept the PDA to a minimum.

Jenner's big sis Kim Kardashian, who had a little pre-match tea with Serena Williams, was also in the crowd taking in the excitement. She even posed for a fan's selfie.

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