The season premiere of The Hills, "Paris Changes Everything," was the highest rated episode of the series in its three-plus season history, according to MTV.

With about 4.7 million viewers Monday, the premiere of the Lauren Conrad-led reality show was the most watched program across all of TV for viewers aged 12 to 34 in its time slot, and the highest rated cable telecast of 2008 so far.

An additional 1.8 million streams were delivered on Tuesday by MTV.com. It is more and more clear that The Hills is MTV's cash cow these days!