Looks like A Walk to Remember actress Pad de la Huerta had a little too much to drink last night ... shown here exiting the Beverly Hilton slurring her words so much that we can barely make out what girlfriend is saying.

In fact, girlfriend is so drunk she gets denied entrance moments later at the Chateau Marmont -- a feat we thought only possible by the likes of ... oh, well, we won't mention names. This time.