Also Known As:
- Magnolia
- Magnólia
- Магнолия
- Mag·no'li·a
- Manolya
- Paul Thomas Anderson
- Paul Thomas Anderson
- Julianne Moore ... Linda Partridge
- William H. Macy ... Donnie Smith
- John C. Reilly ... Officer Jim Kurring
- Tom Cruise ... Frank T.J. Mackey
- Philip Baker Hall ... Jimmy Gator
- Philip Seymour Hoffman ... Phil Parma
- Jason Robards ... Earl Partridge
- Alfred Molina ... Solomon Solomon
- Melora Walters ... Claudia Wilson Gator
- Michael Bowen ... Rick Spector
- Ricky Jay ... Burt Ramsey / Narrator
- Jeremy Blackman ... Stanley Spector
- Melinda Dillon ... Rose Gator
- April Grace ... Gwenovier
- Luis Guzmán ... Luis (as Luis Guzman)
- Henry Gibson ... Thurston Howell
- Felicity Huffman ... Cynthia
- Emmanuel Johnson ... Dixon (as Emmanuel L. Johnson)
- Don McManus ... Dr. Landon
- Eileen Ryan ... Mary
- Danny Wells ... Dick Jennings
- Orlando Jones ... Worm
- Michael Murphy ... Alan Kligman Esq.
- Pat Healy ... Sir Edmund William Godfrey / Young Pharmacy Kid
- Genevieve Zweig ... Mrs. Godfrey
- Mark Flannagan ... Joseph Green
- Neil Flynn ... Stanley Berry
- Rod McLachlan ... Daniel Hill
- Allan Graf ... Firefighter
- Patton Oswalt ... Delmer Darion
- Raymond 'Big Guy' Gonzales ... Reno Security Guard
- Brad Hunt ... Craig Hansen
- Jim Meskimen ... Forensic Scientist
- Chris O'Hara ... Sydney Barringer
- Clement Blake ... Arthur Barringer
- Frank Elmore ... 1958 Detective
- John Kraft Seitz ... 1958 Policeman
- Cory Buck ... Young Boy
- Tim Soronen ... Infomercial Guy (as Tim 'Stuffy' Sorenen)
- Jim Ortlieb ... Middle Aged Guy
- Thomas Jane ... Young Jimmy Gator
- Holly Houston ... Jimmy's Showgirl
- Benjamin Niedens ... Little Donnie Smith
- Veronica Hart ... Dentist Nurse #1
- Melissa Spell ... Dentist Nurse #2
- James Kiriyama-Lem ... Dr. Lee
- Jason 'Jake' Cross ... Pedestrian #1 (as Jake Cross)
- Charlie Scott ... Pedestrian #2
- Juan Medrano ... Nurse Juan
- John Pritchett ... Police Captain
- Cleo King ... Marcie
- Michael Shamus Wiles ... Captain Muffy
- Jason Andrews ... Doc
- John S. Davies ... Cameraman
- Kevin Breznahan ... Geoff / Seminar Guy
- Miguel Pérez ... Avi Solomon (as Miguel Perez)
- David Masuda ... Coroner Man
- Neil Pepe ... Officer #1
- Lionel Mark Smith ... Detective
- Annette Helde ... Coroner Woman
- Lynne Lerner ... Librarian
- Scott Burkett ... WDKK Page #1
- Bob Brewer ... Richard's Dad
- Julie Brewer ... Richard's Mom
- Nancy Marston ... Julia's Mom
- Maurey Marston ... Julia's Dad
- Jamala Gaither ... WDKK P.A.
- Amy Brown ... WDKK Page #2
- Meagen Fay ... Dr. Diane (as Meagan Fay)
- Patricia Forte ... Mim
- Patrick Warren ... Todd Geronimo
- Virginia Pereira ... Pink Dot Girl (voice)
- Craig Kvinsland ... Brad the Bartender
- Patricia Scanlon ... Cocktail Waitress
- Natalie Marston ... Julia
- Bobby Brewer ... Richard
- Clark Gregg ... WDKK Floor Director
- Art Frankel ... Old Pharmacist
- Matt Gerald ... Officer #2
- Guillermo Melgarejo ... Pink Dot Guy
- Paul F. Tompkins ... Chad, Seduce & Destroy (voice)
- Mary Lynn Rajskub ... Janet, Frank's Assistant (voice)
- Jim Beaver ... Smiling Peanut Patron #1
- Ezra Buzzington ... Smiling Peanut Patron #2
- Denise Woolfork ... Smiling Peanut Patron #3
- New World Harmonica Trio ... Harmonica Players
- Robert Downey Sr. ... WDKK Show Director (as Bob Downey Sr. 'a Prince')
- William Mapother ... WDKK Show Director's Assistant
- Larry Ballard ... WDKK Medic
- Brett Higgins ... Mackey Disciple Twin #1
- Brian Higgins ... Mackey Disciple Twin #2
- Michael Phillips ... Mackey Disciple in Middle (as Michael 'Jocco' Phillips)
- Lillian Adams ... Donnie's Old Neighbor
- Steven Bush ... Paramedic #1
- Mike Massa ... Paramedic #2
- Dale Gibson ... Paramedic #3
- Scott Alan Smith ... E.R. Doctor
- Junichi Yanagita ... Mackey's Follower
- Robert Bella ... Detective #2
- Douglas Busby ... Featured SAG Role
- Christina Eliason ... Hot Date
- Thomas Griffin ... Forensic Scientist
- Phil Hawn ... Bob, Seminar Attendee
- Fernando Lara ... Arresting Police Officer
- Miriam Margolyes ... Faye Barringer
- Tom Ohmer ... Detective
- Lynne Oropeza ... Bride
- Dayna Price ... Brenda Barringer
- Herb Santos Jr. ... 21 Dealer
- Colleen Sturtevant ... Gameshow Audience Member
- Tom Tangen ... Drunken Dart Player
- Sean Wilson ... Arresting Police Officer
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