Just before midnight last night, Metro conducted a traffic stop on a car near Wynn Las Vegas.
When pulled over, officers detected the scent of marijuana coming from the car.
On further investigation, they found Paris Hilton in the passenger seat with a controlled substance that later turned out to be cocaine.
She was arrested on possession and put in the Clark County Detention Center.
The undisclosed male driver was also booked for possession and DUI.
Both are expected to be released on bail later this morning. Read more on Tao of Poker.