The In-Laws

Steve Tobias (Michael Douglas) is in fact CIA. His partner Angela (Robin Tunney) double crosses him, but is then double crossed by Jean-Pierre Thibodoux. Jean-Pierre sends a torpedo towards the wedding party. Steve and Jerry (Albert Brooks) save the day, but the wedding itself is ruined. Mark and Melissa (Ryan Reynolds and Lindsay Sloane) are married in a private ceremony on the beach, just as Melissa had always wanted.

Thanks, Silvermarc!