Hard to believe we first met the cast of American Pie back in 1999! Now, the original cast is back for the new flick American Reunion.

Chris Klein, Shannon Elizabeth, Seann William Scott, Jason Biggs and a very pregnant Alyson Hannigan all hit the red carpet still looking sexy after all these years. Mena Suvari, Eddie Kaye Thomas and Tara Reid also made an appearance.

As you can imagine, the fans went wild as the stars arrived at the Grauman's Chinese Theatre in Hollywood.

Check out the below Twitpic of a tanned and gorgeous Tara Reid posing alongside the Jedward twins ... and an apple pie.

The movie hits theaters on April 6, and we can't wait!

Click thru to see the hilarious trailer.

Chris Klein was sentenced this morning to four days in jail for his second DUI in June, time that the actor has already served.

Chris was awarded the mandatory minimum sentencing for a repeat DUI offender, as well as four years of probation, and must also install an ignition interlock device on his car to prevent him from driving while intoxication.

Klein, whose blood alcohol level was tested at three times over the legal limit, issued a heartfelt apology to the judge.

"I apologize for my wrongdoing and I really appreciate that the court gave me the opportunity to prove how seriously I took all of this," Chris said in court this morning.

Chris checked himself into rehab for two months on his own accord following his most recent arrest.

Chris Klein will be extending his stay at the Cirque Lodge in Sundance, Utah. His rep released the following statement to X17online: "Chris, along with his support team, has decided to extend his treatment. He is doing fantastic and is optimistic about his future. He thanks everyone for their continued support."

It is not known how long the American Pie actor will remain at the rehab facility, where he has been since July 21st following his 2nd DUI arrest on June 16th, where his blood alcohol level was found to be nearly three times the legal limit.

Think his extended trip to rehab will help convince the judge he's serious about his sobriety?

Chris Klein will spend a mandatory four days in jail after being arrested under suspicion of a DUI earlier this month.

Klein, who had a blood alcohol content almost three times the legal limit, subsequently checked himself into rehab, "to take a clear look at a problem he has been trying to deal with himself for years."

But today, the City Attorney's office said he will spend a mandatory minimum four days in jail (and a maximum of one year) if convicted of one count of driving under the influence with a prior conviction and one count of driving with a .08 blood alcohol level or higher.

Additionally, if he wants to drive again, Chris will have to deal with the installation of an Ignition Interlock Device in his car, which means he'll have to blow into a breathalyzer every time he wants to start his car. If he blows more than the legal limit of .08, his car will not start.

After being arrested on suspicion of driving under the influence last week, actor Chris Klein has voluntarily checked himself into rehab.

His rep released the following statement to X17online:

"After recent events, Chris was forced to take a clear look at a problem he has been trying to deal with himself for years. He understands now that he can not beat this disease alone. He thanks everyone for their support as he takes all the necessary steps to deal with his addiction and asks for privacy while doing so."

Klein was pulled over around 3am on June 16 on 101 freeway, and after failing the sobriety test, Klein was taken to a Van Nuys area jail where he was booked. The CHP confirmed to X17online that Klein's blood alcohol level at the time of his arrest was between "more than double the legal limit and close to triple the legal limit." This was the American Pie star's second DUI -- as you may recall, he was busted for driving drunk back in 2005 as well.

It's being reported that Klein is at the Cirque Lodge in Utah, where stars such as Lindsay Lohan have sought treatment for their addictions.

The CHP has confirmed to X17online that Chris Klein's blood alcohol level at the time of his arrest was between "more than double the legal limit and close to triple the legal limit."

Due to the ongoing investigation, they declined to give out Klein's exact blood alcohol level at the time of his 3am arrest on the 101 Freeway.

The 31-year old actor's bail was set at $25,000. Law enforcement tells us that Klein was released from jail on his own recognisance. We're told that means once he sobered up in jail, he posted bail and left.

Since Klein will be facing a judge after July 1 in relation to this DUI arrest, that means he'll fall under the new law involving the installation of an Ignition Interlock Device. Plus, this is his second DUI arrest! The law states, first-time and repeat DUI offenders in Alameda, Los Angeles, Sacramento, and Tulare counties must have an Ignition Interlock Device (IID) installed on vehicles they own or operate The law calls for a five-year pilot program that runs through Dec. 31, 2015.

In case you're not familiar with the IID, it's a device that forces the driver to blow into it ... testing their blood alcohol level. The car will not start if they're over the limit. Sorry Chris. That blows.

Chris Klein, best known for his role in American Pie, has been arrested on suspicion of driving under the influence.

Law enforcement officials have confirmed to X17online that the actor was busted just after 3am while on the 101 freeway near Woodman Ave.

After failing the sobriety test, Klein, 31, was put in the backseat of a CHP unit and taken to a Van Nuys-area jail where he was booked.

Hard to believe that he and Katie Holmes were once a hot item!

Stay tuned for the addition of Klein's mugshot to the Hall of Shame.

There was so much man meat at Guys And Dolls last night, that Kendra probably couldn't swing her fake boobies without hitting a hunk!

Some flew solo, like the night's DJ Benji madden, a sad looking Deryck Whibley and DWTS' Derek Hough, but others brought their ladies (Michael Lohan) while Katie Holmes' ex Chris Klein showed up with a mystery woman and a mystery cure for his balding head!

But these weren't the only guys at Guys And Dolls. Check out the gallery for even more testosterone...if you can handle it!