Kim Kardashian made a grand return to the Playboy mansion.

Only on this date, no nude pictures resulted from the trip.

Sorry guys.

The reality star and her family host the "Aces and Angeles" charity event at the Mansion, benefiting Orange County Professional Firefighters Association Fallen Firemen's Relief Association Widows, Orphans and Disabled Firemen's Fund.

It's always nice to see stars give back and show respect for important causes. But it's also nice to see this, a shot of Kim showing off her most prized asset ...

A wise woman once said Kim's booty should have its own social security number. We think she meant to say ZIP code, but the point remains - thing is pretty substantial.

Also on hand were Kim's sister Khloe Kardashian and the even more useless and poorly spelled Brittny Gastineau. Click to enlarge more photos of KK:

[Photos: Splash News Online]