Mary-Kate Olsen went on a secret date with "Superbad" actor Jonah Hill. The 22-year-old actress, who is believed to be in a relationship with artist Nate Lowman, was reportedly seen with Jonah at Los Angeles' Chateau Marmont Hotel last week.

A source told the National Enquirer magazine: "It was a shock to see Mary-Kate together with, of all people, geeky Jonah. They were on a double date with another couple, dining at the hotel around 10 pm."

"Mary-Kate and Jonah sat close together and seemed totally into each other. They were both wearing plaid shirts that almost matched. It was the cutest thing."

"From what I saw, Mary-Kate had forgotten about Nate and seemed totally enamored with Jonah. And he couldn't keep his eyes off her, either."

It has also been claimed Jonah was overheard telling his friend, actor Jason Segal, he had asked "The Wackness" star on a date and she had agreed.

Mary-Kate - who previously dated the late Heath Ledger - went to a Radiohead concert with boyfriend Nate the night before she was seen with Jonah.

RELATED PHOTOS AND ARTICLES
Jonah Hill - Los Angeles Premiere of Jonah Hill - Heath Ledger - 10th Annual Screen Actors Guild Awards - ArrivalsMary-Kate Olsen - New York Minute Movie Premiere - ArrivalsMary-Kate Olsen - Martin Creed and Calvin Klein Spring/Summer 08 - Party ArrivalsMary-Kate Olsen - Martin Creed and Calvin Klein Spring/Summer 08 - Party Arrivals
Michelle Williams Seen Hooking Up With Spike JonzeHeath Ledger's Dad To Open A Bar He Planned Before He Died
Julia Stiles Breaks Up With Boyfriend Jonathan CramerMichelle Williams Hires Bodyguard To Ward Off Paparazzi
Nicole Richie Furious Over Joel Madden's Friendship With Mary-Kate OlsenJohnny Depp Thinks Playing The Riddler In New Batman Film Would Be "Fun"
BE THE FIRST TO COMMENT ON THIS STORY!
Name: (optional)
E-Mail: (required, but never displayed)
Remember your info for next time?
Profanity and other defamatory language is not allowed. Please keep it clean.