Even though everyone says that Kitty has gotten plainer, to Levin she had never looked so beautiful.
The issue with the shirt is forgiven, and the wedding goes splendidly. The couple is so distracted by their emotional happiness that they mess up a few times, but it's no big deal. They truly feel like two individuals united as one.
Kitty doesn't hear a word of the service, as a powerful feeling has taken control of her. This feeling is the sense of leaving behind her old life and embarking on a new one; without even knowing him that well, Levin has become the most important person in her life.