WATCH: Amy Schumer Crashes, Sings at an Irish Wedding

What do Amy Schumer and Judd Apatow do when they find themselves stumbling into an Irish wedding? Why, make the most of it and become the lives of the party.

The comedian and director stopped to visit a bar in Dublin while they were in Ireland to promote their flick, "Trainwreck" when they, and a bunch of lucky guests, got the surprise of a lifetime.

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Eithne McAdams, the blushing bride, and her groom J.P. Swine were surrounded by their close family and friends at Gorgans Pub over the weekend when they spotted the famous duo walk into the room.

The group was understandably excited to share the special day celebrating the newly named Mr. and Mrs. Swine, when their day somehow got even better.

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And as one wedding attendee pointed out, Schumer and Apatow wasted no time getting to know the couple and their loved ones, and made room for themselves at their table to, what else, start a group sing-along.

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Clearly, this is a wedding that no one will soon forget!

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