Jon Hamm, Ed Helms, Jeremy Renner and Jake Johnson gave one lucky couple the surprise of a lifetime as they crashed their wedding.

The A-listers were in the middle of doing press for their latest film “Tag” when they spotted the lavish ceremony taking place at the Fontainbleu Miami Beach on Sunday evening. So, naturally, they had to go in and say hello.

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Hamm, Helms and Johnson told ET Canada why they sent Renner in first, and he ended up interrupting the best man’s speech. “We saw it happening and we were like, ‘Oh my gosh, that’s kinda there, like, we should just go say ‘hi,'” said Hamm. “We sent Renner in first.”

However, despite pointing out that he was in the middle of something, the groom’s pal quickly came around and attempted to snap a selfie with the actor, before Renner’s celeb friends came in to join the party.

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Hamm insisted everybody at the bash was “very sweet.”

The stars even posed for a group photo and later took to social media to say a huge thanks to the newlyweds.

“Tag” hits theatres June 15. Watch more with the cast below.