Paris Hilton is adding yet another notch to her bedpost, and this time it's 'Desperate Housewives' hunk Josh Henderson. Henderson used to date Ashlee Simpson and was seen on her reality show for a little while.

Hilton celebrated St. Patrick's Day with Henderson, meeting up first at nightclub Area before going to Paris' house for a party. According to insode sources, the two were smitten and couldn't take their eyes off each other the entire evening.

"They couldn't take their eyes off of each other", a source tells Star. "Paris looked completely smitten with Josh. She just kept smiling and laughing at everything he said, like she was under his spell. They actually make a really good looking couple."

Then they took off for Hilton's house.

"Paris and Josh sat in the backseat of the car by themselves for about 15 minutes," says the source. "It was just the two of them talking and flirting. I guess they wanted to have some alone time before heading to Paris' house where she had a St. Patrick's Day party."

Once at the party, they still were joined at the hip.

"Paris was with Josh most of the night. She appeared to be having a lot of fun. The two were in the kitchen the entire night eating pizza and talking."

It sounds to me like Paris is going to need to invest in some new bedposts pretty soon. I'm not sure there's too much room on the old ones for any more notches.

Labels: Ashlee Simpson, Desperate Housewives, Josh Henderson, Paris Hilton