In *Kingdom Come: Deliverance 2*, the "Wedding Crashers" main quest might seem straightforward, but finding the newlyweds to congratulate them can be tricky if you don't know where to look. Once it's clear that Otto von Bergow won't be attending Lord Semine's wedding, it's time to conclude the quest and find an alternative way to meet him. To successfully complete "Wedding Crashers," you must congratulate the newlyweds before leaving the celebration. However, locating Agnes and Lord Semine proves challenging as they are not immediately visible.
Before you seek out Agnes, make sure you've completed any additional tasks you want to do at the wedding. Once you start talking to Agnes, the quest will lead directly into its conclusion, transporting you to Trosky Castle. By this point, you should have already experienced the majority of the wedding's side content, which occurs before the ceremony itself.
While mingling with the party-goers, you might ask them about the whereabouts of the newlyweds. Since no one can provide an answer, it's best to skip this and head straight to Agnes. If you previously pilfered some schnapps from the wine cellar, finding her will be easier.
Regardless of how your conversation with Agnes unfolds, it inevitably leads to a man stumbling into the cellar and sparking a brawl that spreads throughout the wedding. You can choose to stay in the cellar until the time passes or join the fight. The outcome remains the same, culminating in a cutscene where both Henry and Hans end up imprisoned at Trosky Castle.
That's how you congratulate the newlyweds in *Kingdom Come: Deliverance 2*. Next up, you'll want to tackle the "For Whom the Bell Tolls" main quest, where completing tasks within a specific time limit can boost your reputation, adding an element of urgency to your adventure.