Che gleefully took to his Instagram story to share a screenshot of a text Jost sent him after the clown entertained them at their table.
Jost sent his comedy partner a photo of himself with a crown made out balloons, and Che captioned the screengrab, "I sent a party clown to Colin's very intimate birthday dinner."
While the birthday boy looked less than thrilled by the unexpected clown visit -- and even followed the photo up with a text that simply read "goddamnit" -- his movie star girlfriend was beaming, and couldn't have looked more excited by the surprise.
Che's response to Jost's text was just a laughing and cying emoji, which felt very much like Johansson's reaction to the situation.
The amazing prank is just one facet of what makes Che and Jost such a great team, and why they recently were both promoted to being co-head writers on SNL in December 2017.
The pair posed for photos on the carpet outside the premiere of Avengers: Infinity War in Hollywood, California, and the actress spoke with ET about how thrilled she was to have Jost by her side for the event.