Pearl Jam [ tickets ], Metallica [ tickets ] and Kanye West [ tickets ] are among highlights of the initial lineup revealed by organizers of this summer's seventh annual Bonnaroo [ tickets ] Music and Arts Festival.

The current roster of talent for the four-day outdoor event--which takes place June 12-15 this year at its traditional location, a 700-acre farm in Manchester, TN, about 60 miles south of Nashville--also includes Jack Johnson [ tickets ], Robert Plant [ tickets ] and Alison Krauss [ tickets ], Willie Nelson [ tickets ], Death Cab for Cutie [ tickets ], Sigur Ros [ tickets ] and about 60 other acts.

The full initial lineup for the festival is included below. Organizers expect the list to eventually grow to more than 100 musical acts and 20 comedians, according to a press release, with new names being periodically announced in coming weeks.

Tickets for the event will go on sale to the public starting Feb. 16 exclusively through the Bonnaroo [ tickets ] festival's website.

In addition to music and outdoor camping, the event will offer "24 hours of activities," according to organizers, including a comedy theater, cinema festival, jazz club, silent disco, arcade, Internet cafes, restaurants, yoga classes and "high quality craft vendors."

The festival's "comedy tent" will feature Janeane Garofalo, Zach Galifianakis, Mike Birbiglia, Jim Norton, Brian Posehn and David Cross, who will host "Bonnaroo Late Time Chat About," which a press release calls "an original midnight talk show complete with a house band, comic skits and special guests."

Organizers of Bonnaroo (which is Cajun slang for "really good time") have placed an increasing emphasis on environmental awareness since the event's 2002 debut, and have taken steps to reduce or eliminate the environmental impact of the festival. Such measures include diverting 60 percent of the event's waste from landfills last year and replacing more than 25,000 gallons of diesel fuel with bio-diesel, according to a press statement.

Initial Bonnaroo lineup:

Pearl Jam [ tickets ] Metallica [ tickets ] Jack Johnson [ tickets ] Kanye West [ tickets ] Robert Plant [ tickets ] & Alison Krauss [ tickets ] Phil Lesh & Friends My Morning Jacket The Allman Brothers Band The Raconteurs Willie Nelson [ tickets ] Death Cab for Cutie [ tickets ] B.B. King Sigur Ros [ tickets ] Levon Helm and the Ramble on the Road Ben Folds O.A.R. The Bluegrass Allstars Feat. Luke Bulla, Sam Bush, Jerry Douglas, Bela Fleck, Edgar Meyer and Bryan Sutton M.I.A. Umphrey's McGee Iron & Wine Yonder Mountain String Band Swell Season Talib Kweli Derek Trucks & Susan Tedeschi’s Soul Stew Revival Gogol Bordello Broken Social Scene Robert Randolph's Revival Rilo Kiley Mastodon Lupe Fiasco Against Me! Sharon Jones & the Dap Kings Pat Green Ozomatli Tegan & Sara Solomon Burke Drive-By Truckers !!! The Avett Brothers Israel Vibration Abigail Washburn & the Sparrow Quartet featuring Bela Fleck Phil Lesh / Larry Campbell / Jackie Greene Aimee Mann Ladytron The Fiery Furnaces Orchestra Baobab Ghostland Observatory Jose Gonzalez Dark Star Orchestra Minus the Bear Donavon Frankenreiter Lez Zeppelin State Radio Battles Jakob Dylan Two Gallants The Sword Vampire Weekend Little Feat Nicole Atkins The Felice Brothers Mason Jennings MGMT The Lee Boys Black Kids Serena Ryder Steel Train Grupo Fantasma Back Door Slam

Bonnaroo Comedy: Bonnaroo Late Night Chat About with David Cross Janeane Garofalo Zach Galifianakis Jim Norton Brian Posehn Mike Birbiglia John Mulaney Michelle Buteau