Helen Hunt as Jo

Bill Paxton as Bill

Jami Gertz as Melissa

Cary Elwes as Jonas

Lois Smith as Aunt Meg

Philip Seymour Hoffman as Dusty

Alan Ruck as Rabbit

Sean Whalen as Sanders

Scott Thomson as Preacher

Todd Field as Beltzer

Joey Slotnick as Joey

Wendle Josepher as Haynes

Jeremy Davies as Laurence

Zach Grenier as Eddie

Gregory Sporleder as Willie

Patrick Fischler as The Communicator

Nicholas Sadler as Kubrick

Ben Weber as Stanley

Anthony Rapp as Tony

Erik LaRay Harvey as Eric

Abraham Benrubi as Bubba

Jake Busey as Mobile Lab Technician

Melanie Hoopes as Patty

J. Dean Lindsay as Dean

Dan Kelpine as Diner Mechanic

Sharonlyn Morrow as Waitress

Richard Lineback as Father

Rusty Schwimmer as Mother

Alexa PenaVega as Jo – 5 years old

Taylor Gilbert as NSSL Scientist – Bryce

Bruce Wright as NSSL Scientist – Murphy

Gary England as TV Meteorologist #1

Jeff Lazalier as TV Meteorologist #2

Rick Mitchell as TV Meteorologist #3

John Thomas Rhyne as Paramedic

Paul Douglas as Bodger

Samantha McDonald as Drive-in Girl

Jennifer L. Hamilton as Drive-In Girl

Anneke de Bont as Farm Girl

Darryl Cox as Four Corners Mechanic (uncredited)

Thomas E. Bentley as Farmer 1 (uncredited)

Jon Bielich as Survivor (uncredited)

Mark Falvo as Survivor (uncredited)

Ben Jackson as Survivor (uncredited)

David Dillinger Jefferis as Townsperson (uncredited)

Brad Masters as Cameraman (uncredited)

April Warren as Flashback Mom (uncredited)