Hilary Duff as Cher
Raven-Symoné as Dionne
Khleo Thomas as Murray
Amanda Bynes as Tai
Jeremy Sumpter as Josh
Eugene Levy as Mel

Cher Horowitz - Rachel McAdams
Dionne - Vanessa Minnillo
Murray - Jerry Ferrara
Tai - America Ferrera
Josh - Adam Brody
Mel Horowitz - Alan Dale

Cher Horowitz- Gisele Bundchen
Dionne- Meagan Good
Murray- Nick Cannon
Tai-Christina Milian
Josh- Stephen Colletti
Mel Horowitz- Andy Garcia

Cher- Evan Rachel Wood
Dionne- Alexa Vega
Murray- Nick Cannon
Tai- Lindsay Lohan
Josh- Milo Ventimiglia
Mel- Steve Martin

Cher Horowitz - Ashley Tisdale
Dionne - Christina Milian
Murray - Bow Wow
Tai - Alia Shawkat
Josh - Tom Welling
Mel Horowitz - Paul Reiser

Cher: Rachel Bilson
Dionne: Mandy Moore
Murray: Josh Henderson
Tai: America Ferrara
Josh: Jake Gyllenhaal
Mel Horowitz: Chris Noth

Cher: Hilary Duff
Dionne: Eva Pigford (from ANTM)
Tai: Christina Ricci
Murray: Bow Wow
Josh: Adrian Grenier
Mel: James Spader

Cher: Rachel McAdams
Dionne: Ashanti or Bianca Lawson
Tai: Thora Birch
Murray Robert Ri'chard
Josh: Adrien Grenier
Mel: Ed Harris

Cher: Amanda Bynes
Dionne: Christina Milian
Tai: Alexis Bledel
Murray: Nick Cannon
Josh: Adrien Greiner
Mel: John Lithgow

Cher Horowitz: Brittany Snow

Dionne: Solange Knowles

Murray: Chris Brown

Tai: Mandy Moore

Josh: Benjamin McKenzie

Mel Horowitz: Will Ferrell

Cher: Hayden Panettiere
Dionne: Meagan Good
Tai: Lizzy Caplan (Janis from Mean Girls)
Murray:Nick Cannon
Josh: Adam Brody
Mel: Robert DeNiro

Cher- Mila Kunis
Dionne- Tatyana Ali
Murray- Omarion Grandberry
Tai- Lindsay Lohan
Josh- Justin Chambers
Mel Horowitz- Stephan Colbert

Cher: Kate Bosworth
Dionne: Rihanna
Tai: Amber Tamblyn
Murray: Channing Tatum
Josh: Luke Wilson
Mel: Fred Willard

Cher Horowitz - Mandy Moore
Dionne - Christina Milian
Murray - Nick Cannon
Tai - Eva Amurri
Josh - Adam Brody
Mel Horowitz - Bill Murray

Cher Horowitz - Amanda Bynes
Dionne - Solange Knowles
Murray - Lil' Romeo
Tai - Jenna Dewan
Josh - Shia Le Beouf
Mel Horowitz - Bryan Cranston

Cher- Hayden Panettiere
Dionne- Kyla Pratt (the voice of Penny Proud!)
Murray- Michael B. Jordan (was Reggie on AMC)
Tai- Anneliese van der Pol (Raven's best friend)
Josh- Dave Annable
Mel- Al Pacino

cher- rachel mcadams (come on..she killed it in mean girls!)
dionne- beyonce
murray- nick cannon
tai- america ferrara
josh-adam brody
mel- bruce willis

cher- Hayden Panettiere
dionne- Jennifer Freeman
murray- ne-yo
tai- Zoey Deschanel
josh- Shia LaBeouf
mel- George Cloony

Cher Horowitz - Amanda Seyfried
Dionne - Devon Aoki
Murray - Francis Capra (Weevil from Veronica Mars)
Tai - America Ferrerra
Josh - Josh Duhamel
Mel Horowitz - Terry O'Quinn (John Locke!)

(Steve Carell should play the teacher!)

Cher Horowitz - Amanda Bynes
Dionne - Raven Symone
Murray - Bow Wow (formerly Lil Bow Wow)
Tai - Hallie Kate Eisenberg (remember the Pepsi girl? She's so pretty now and she's got Tai hair!!)
Josh - Adam Brody (almost a dead-ringer for Paul Rudd...but nothing beats the original)
Mel Horowitz - Ben Stiller

And how about Hayley Duff as Amber???

"Do you prefer fashion victim or ensembly-challenged?"

Cher Horowitz: Becki Newton (Amanda from Ugly Betty)
Dionne: Natina Reed (Jenelope from Bring it On: "Can we just beat these Buffys down so I can go home? I'm on curfew, girl.")
Murray: Nick Cannon
Tai: Amanda Bynes
Josh: John Krasinski
Mel Horowitz: Ted Danson

Cher - Hillary Duff (with blonde hair)
Dionne - Jessica Alba
Murray - Chad Michael Murray
Tai - Maggie Gyllenhaal
Josh - Ryan Reynolds
Mel - Alec Baldwin

Here's my cast for doing the updated musical version of Clueless:
Cher - Hillary Duff
Dionne - Ashanti
Murray - Chris Brown
Tai - Jo-Jo
Josh - Adam Levine
Mel - John Travolta

Cher Horowitz - Hayden Panettiere
Dionne - Monique Coleman (High School Musical)
Murray - Bow Wow
Tai - Amanda Bynes
Josh - Shia LeBeouf
Mel Horowitz - Steve Carrell

---
"Well behaved women rarely make history." -Laurel Thatcher Ulrich

Cher- Emmanuelle Chirqui
Dionne- Zoe Saldana
Murray- Mos Def
Tai- Ginnifer Goodwin
Josh- Jake Gyllenhaal
Mel- Chris Noth

AND because I couldn't help myself:
Christian- Hayden Christensen
Elton- Wentworth Miller
Amber- Sophia Bush
Travis- Colin Hanks

This was really tough!

Cher: Sarah Michelle Gellar
Dionne: Jessica Alba
Murray: Gaius Charles
Tai: America Ferrara
Josh: Ben Affleck
Mel: Bradley Whitford

i vote for lonewolf...can't beat that cast!

Cher - Lindsay Lohan
Dionne - Ciara
Murray - Bow Wow
Tai - Amanda Bynes
Josh - Zach Braff
Mel - Tony Shalhoub

[must be exhausting to lose your own game]

Cher: Amanda Bynes
Dionne: Zoe Saldana
Murray: Deon Richmond
Tai: Lacy Chabert
Josh: Josh Hartnett
Mel: John Voigt

"Party like a rock star, pound like a porn star, play like an all star!"

Cher: Paris Hilton
Dionne: Monique Coleman (high school musical)
Murray: Percy Daggs III (veronica Mars)
Tai: Michelle Rodriguez
Josh: Adam Brody
Mel: Steve Carrell

Cher – Sarah Chalke
Josh – John Krasinski
Dionne – Rosario Dawson
Murray – Finesse Mitchell
Tai – Alyson Hannigan
Mel Horowitz – William H. Macy

Cher - Emma Roberts
Dionne - Amerie
Murray - Khleo Thomas
Tai - JoJo
Josh - Shia LaBeouf
Mel - Will Ferrell (stretch? Just thought it would be funny)

Cher: Hayden Panettiere
Dionne: Christina Milian
Tai: America Ferrera
Murray:Nick Cannon
Josh: Zach Braff
Mel: Jeffrey Tambor

Cher Horowitz - Hayden Panettiere
Dionne - Zoe Saldana
Murray - Nick Cannon
Tai - Eva Amurri
Josh - Ashton Kutcher
Mel Horowitz - Tony Shalhoub

I would have never though Bills as Cher but legaleagle, i think that cast looks great!

Ok...first I don't know if any cast could be as good as the original, but if I must...

Cher Horowitz - Hayden Panettiere
Dionne - Shanica Knowles
Murray - Corbin Bleu (High School Musical)
Tai – Andrea Morris (Margaret 7th Heaven)
Josh - Adam Brody
Mel Horowitz - Hank Azaria

Cher - Mandy Moore
Dionne - Jessica Alba
Murray - Donald Faison (original Member
Tai - Alyison Hannigan my first pick would be drew barrymore if she was younger
Josh - John Krasinski
Mel - Steve Carrell

and the B list because I can't help myself
Elton - Joshua Jackson
Travis - Justin Long
Amber - Danneel Harris{Racheal from One Tree Hill}
Christian- Christopher Gorham