Halloween is HERE!

Well, kind of. Ok, so it’s not OFFICIALLY until Wednesday, but that hasn’t stopped the A-List hitting up their local fancy dress store in search of the silliest, sexiest and most downright ridiculous outfits out there. Pictures are already coming through from ‘pre’ Halloween parties over Halloweekend.

Here are our best dressed so far!

Jessica Alba and Cash Warren & Family as the Incredibles

Jessica Alba has an Incredible Halloween with her family. The actress took to Twitter this weekend to showcase she, her husband Cash Warren, and daughters Honor and Haven in their group costume this year as the superhero family from The Incredibles. Top family effort.

Fergie and Josh Duhamel as Angelyne and Dennis Woodruff

The pair were spotted on their way into a costume party last night, dressed as Angelyne, AKA the notorious ‘model’ who bought billboards advertising herself, and Dennis Woodruff, the man known for driving up and down the Sunset Strip with hand-painted signs promoting his self-written, directed, and acted films all over his car!

Ryan Seacrest and Julianne Hough as Bonnie and Clyde

Bang Bang! Ryan Seacrest and Julianne Hough were Bonnie & Clyde for the big Beverly Hills bash Friday night. And don’t they just look adorably mischievous here!?! I think however those dogs should win the best dressed award!

Deryck Whibley as ex-wife Avril Lavigne and Ari Cooper as Chad Kroeger!

And the Most HIGHLARIOUS Costume Award goes to…

Deryck Whibley and Ari Cooper!!!

The Sum 41 singer and his model girlfriend dressed up as Deryck’s ex-wife Avril Lavigne and her new fiance — Nickelback’s Chad Kroeger! Deryck really knows how to work a frown! Ha

Think any other celebrity’s Halloween costume will be able to beat the hilarity here??

Paris Hilton and River Viiperi just can’t get enough!

Paris Hilton and her model beau River Viiperi show their Halloween spirit while arriving for Hugh Hefner‘s Halloween party at the Playboy Mansion on Saturday (October 25) in Beverly Hills, Calif.

The 31-year-old socialite dressed as a fairy, while River, 21, went as a Native American.

The day before, Paris and River also hit up a Halloween party in the style of Alice in Wonderland – Paris as Alice and River as the Mad Hatter.