Paris Hilton and Benji Madden are officially dating.

According to some exclusive source,” They’re really into each other. It’s serious.”

The Good Charlotte rocker and the Hilton babe had been away to St. Louis this weekend, where she was promoting her recently launched perfume. The couple was later spotted on Saturday night at a local nightclub letting their hair down. Paris Hilton was introduced to Benji Madden by her best pal Nicole Richie. Benji Madden also happens to be the brother of Nicole Richie’s fiancé Joel Madden. The duo was first spotted together on Thursday night at Los Angeles Club Villa.

According to an onlooker, “Paris only had eyes for Benji. As soon as she saw him she walked over and gave him a huge slobbering kiss. Then they snuggled down in a corner booth. She stroked his arm and his leg while whispering sweet nothings in his ear.”

Interestingly Benji Madden called it quits with Sophia Monk, who was his fiancée just like two days ago!. Lets see how long Benji sticks to Paris. Going by what we know about this publicity babe we hope the relationship lasts for 2-3 weeks. And if Benji’s stars are not in his favor then it might last long too