Update: Scroll down for an unconfirmed day-by-day breakdown of the lineup.

Afters months of guesses and leaks and a week-long word puzzle, we finally know who will be playing the 2010 edition of Lollapalooza.

This year’s festival, set to take place from August 6-8 at Chicago’s Grant Park, will be headed by what is currently the first scheduled performance for the recently reunited, iconic grunge outfit Soundgarden. Legendary punk rockers Green Day, pop superstar Lady Gaga, influential indie outfits The Strokes and Arcade Fire, and French sensations Phoenix are all set to top the lineup.

Other notables acts include Erykah Badu, Social Distortion, MGMT, Devo, Cypress Hill, Spoon, The National, The New Pornographers, Wolfmother, Gogol Bordello, Grizzly Bear, Yeasayer, Hot Chip, Drive-By Truckers, Dirty Projectors, Metric, Cut Copy, AFI, and the legendary Jimmy Cliff.

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As we scroll further down, names such as Mavis Staples, Minus the Bear, Frightened Rabbit, The xx, Blitzen Trapper, Fuck Buttons, Switchfoot, The Temper Trap, The Dodos, Jamie Lidell, The Cribs, and Raphael Saadiq can also be found.

The bottom tier of the lineup features up-and-comers like Mumford & Sons, Cymbals Eat Guitars, The Soft Pack, The Morning Benders, Warpaint, The Antlers, Freelance Whales, Jukebox the Ghost, and These United States.

Finally, this year’s bill will once again feature Perry’s, a dance-oriented stage. Among those scheduled to appear include 2ManyDJs, Empire of the Sun, Digitalism, Tiga, Felix da Housecat, Rusko, Flosstradamus, Wolfgang Gartner, Joachim Garraud, Peanut Butter Wolf, and a DJ set from Cut Copy.

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As it stands now, the current 2010 bill looks like this:

Soundgarden, Green Day, Lady Gaga, Arcade Fire, The Strokes, Phoenix, Social Distortion, MGMT, Jimmy Cliff, Hot Chip, The Black Keys, The National, Spoon, Devo, Cypress Hill, Cut Copy, The New Pornographers, Erykah Badu, Slightly Stoopid, Grizzly Bear, Gogol Bordello, Chromeo, Wolfmother, Yeasayer, X Japan, Mutemath, Metric, Dirty Projectors, AFI, Mavis Staples, Matt & Kim, The xx, Drive-By Truckers, Blues Traveler

Edward Sharpe & The Magnetic Zeros, The Temper Trap, Jamie Lidell, Frightened Rabbit, Fuck Buttons, Deer Tick, Blitzen Trapper, Stars, Raphael Saadiq, The Cribs, Minus the Bear, Switchfoot, The Walkmen, Mumford & Sons, Wild Beasts, Rogue Wave, Los Amigos Invisibles, The Big Pink, The Dodos, Hockey, Cymbals Eat Guitars, B.o.B, Dawes, Warpaint, The Antlers, The Soft Pack, Rebelution, Balkan Beat Box

Wavves, American Bang, The Ike Reilly Assassination, Company of Thieves, Nneka, Harlem, The Constellations, Miniature Tigers, Mimicking Birds, The Kissaway Trail, HEALTH, Javelin, The Morning Benders, Foxy Shazam, Violent Soho, Royal Bangs, Neon Trees, Freelance Whales, Semi Precious Weapons, Dan Black, The Band of Heathens, Dragonette, My Dear Disco, Shawn Fisher, Neon Hitch, Skybox, The Ettes, Jukebox the Ghost, These United States, MyNameIsJohnMichael

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Perry’s DJ stage lineup:

2ManyDJs, Empire of the Sun, Digitalism, Perry Farrell, Tiga, Felix da Housecat, Rusko, Erol Alkan, Kaskade, Flosstradamus, Wolfgang Gartner, Joachim Garraud, Mexican Institute of Sound, Caspa, Peanut Butter Wolf, Dirty South, NERVO, Cut Copy (DJ Set), Beats Antique, Steve Porter, Didi Gutman of Brazilian Girls, Ancient Astronauts, Ana Sia, Team Bayside High, Dani Deahl, FreeSol, DJ Mel, BBU Vonnegutt, Only Children, Lance Herbstrong

Additional acts, including the lineup for this year’s Kidzapalooza stage will be announced in the weeks ahead. The day-by-day schedule will likely be revealed in June.

Three-day passes are currently priced at $190 and can obtained here. Once that allotment sells out, the price will raise to $215. VIP passes and travel packages are also available.

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Update: For those looking looking to get their scheduling freak on, it appears that Lady Gaga and The Strokes will be playing Friday, Green Day and Phoenix on Saturday, and Soundgarden and Arcade Fire on Sunday. Here is the day-by-day breakdown, which is TOTALLY UNCONFIRMED, per the Lollapalooza message board:

Friday, August 6th:
Lady Gaga
The Strokes
Jimmy Cliff
Hot Chip
The Black Keys
Devo
New Pornographers
Chromeo
Dirty Projectors
Mavis Staples
Matt & Kim
Drive-By Truckers
Jamie Lidell
Fuck Buttons
Raphael Saadiq
The Walkmen
Los Amigos Invisbles
The Big Pink
Cymabalks Eat Guitars
B.o.B
Balkan Beat BOx
Wavves
American Bang
The Constellations
Javelin
Foxy Shazam
Semi Precious Weapons
My Dear Disco
The Ettes
Jukebox The Ghost
These United States
2ManyDJs
Tiga
Erol Alkan
Caspa
Peanut Butter Wolf
Cut Copy (DJ)
Ana Sia
FreeSol
BBU Vonnegutt

Saturday, August 7th:
Green Day
Phoenix
Social Distortion
Spoon
Cut Copy
Erykah Badu
Slightly Stoopid
Grizzly Bear
Gogol Bordello
Metric
AFI
The xx
Blues Traveler
Edward Sharpe
Deer Tick
Stars
Wild Beasts
Rogue Wave
Dawes
Warpaint
The Soft Pack
Rebelution
Harlem
Mimicking Birds
Kissaway Trail
Morning Benders
Royal Bangs
Dan Black
Dragonette
Skybox
Mynameisjohnmichael
Empire of the Sun
Perry Farrell
Rusko
Kaskade
Wolfgang Gartner
Joachim Garraud
Beats Antique
Steve Porter
Ancient Astronauts
DJ Mel
BBU Vonnegutt
Only Children
Lance Herbstrong

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Sunday, August 8th:
Soundgarden
Arcade Fire
MGMT
The National
Cypress Hill
Wolfmother
Yeasayer
X Japan
MUTEMATH
The Temper Trap
Frightened Rabbit
Blitzen Trapper
The Cribs
Minus THe Bear
Switchfoot
Mumford & Sons
The Dodos
Hockey
The Antlers
Ike Reilly
Company of Thieves
Nneka
Miniature Tigers
HEALTH
Violent Soho
Freelance Whales
Band of Heathens
Shawn Fisher
Neon Hitch
Digitalism
Felix da Housecat
Flosstradamus
Mexican Institute of Sound
Dirty South
Nervo
Didi Gutman (Brazilian Girls)
Team Bayside High
Dani Deahl