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A family that parties together, stays together?

It looks like things between the Kardashians, Blac Chyna and Rob Kardashian are totally cool, considering they all spent time together at Khloe Kardashian's birthday party on Monday.

The Keeping Up With the Kardashians star turned 32 this week and in celebration she had a birthday party at Dave and Busters. Kylie Jenner, Kim Kardashian, Kourtney Kardashian, Kris Jenner, Scott Disick and Kanye West were all in attendance at the event, but the most surprising guests at the party were Rob and Blac Chyna.

On this past Sunday's Keeping Up With the Kardashians, Khloe told her sisters "no one should congratulate" Rob and Blac Chyna on their engagement. But the couple, who is expecting their first child together, was front and center at Khloe's party and even posed for pics with the family.

Take a look at the E! News video above to see all of the photos and videos and to get more details on Khloe's party!

Watch E! News weeknights at 2am E| 11pm P, only on E!