Adam Scott embarrasses himself in front of Reese Witherspoon filming 'Big Little Lies'

Adam Scott proves you're never too famous to embarrass yourself.

The comedian shared a story on "Conan" Wednesday night about a time when joking with his "Big Little Lies" co-star Reese Witherspoon landed him in a sticky situation.

"One time with Reese Witherspoon and I, we were shooting a scene," Scott told host Conan O'Brien. "It was the last scene we had together for season two, and it was a scene in a therapist's office. In between takes she said something funny."

The joke made Scott chuckle – and that's where something happened he could not control.

"A string of snot, like, came out, and then wrapped around my nose," he said. "And I just excused myself and went and found the makeup person, got a Kleenex and wiped off."

Although he tried to play it cool, Scott said he's been wracked with snot stress ever since.

"I came back and thought, ‘Should I reference what just happened to Reese? Should I make a joke about it or just apologize for the disgusting thing that just happened?' And I didn't," he said. "For the six months afterwards until the show premiered, I was like, 'Should I text her and, like, make a joke about the snot?' And I never did."

To this day, Scott said he and Witherspoon have not addressed the incident.

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