William and Duchess Kate wedding cost $34 million: The April 29, 2011, wedding was quite expensive.
The breakdown of costs mostly includes security, pegged at $32 million. Thousands of police officers were stationed along the procession route, and military personnel protected foreign dignitaries, according to Radar Online.
-Wedding gown: $434,000
-Wedding cake: $80,000 ($134 a slice)
The couple just celebrated their third anniversary. The plans for the occasion were kept private.