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Fair warning: if you decide to get married at the Trump National Golf Club in Bedminster,Anissa Kate the Widow XXX New Jersey, there's every chance your party might be gate-crashed.

On Saturday, Tucker Gladhill and Kristen Piatowski held their wedding reception at the venue. Once the party was in full swing, CNN reports, Secret Service officers appeared in the room.

Then this guy showed up:

From the looks of the guest's photos on Instagram, Trump -- who was staying at the Club over the weekend -- greeted the bride and groom and posed for photos.

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You can see his entrance in this video. As he wanders into the room he comments on the "beautiful bride" while people shout out, "Looking good, Donald!", "Keep it up!" and "Where's your red hat?" Then someone starts a chant of "USA, USA, USA!" as the President moves off across the room.

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Well, it certainly must have made the occasion more memorable.