Also Known As:- Soy el número cuatro
- Аз съм номер четири
- Я - Четвертый
- A negyedik
- Ani mispar arba
- Ben Dört Numara
- Eimai to noumero tessera
- Eu Sou o Número Quatro
- I Am Number 4
- I Am Number Four
- I Am Number Four: The IMAX Experience
- Ich bin Nummer Vier
- Ja sam broj cetiri
- Jestem numerem cztery
- Jsem císlo ctyri
- Mano numeris ketvirtas
- Numéro Quatre
- Numarul patru
- Som cislo styri
- Sono Il Numero Quattro
- Sou o Número Quatro
- D.J. Caruso
- Alfred Gough
- Miles Millar
- Marti Noxon
- Jobie Hughes (as Pittacus Lore)
- James Frey (as Pittacus Lore)
- Alex Pettyfer ... John Smith
- Timothy Olyphant ... Henri
- Teresa Palmer ... Number 6
- Dianna Agron ... Sarah Hart
- Callan McAuliffe ... Sam
- Kevin Durand ... Mogadorian Commander
- Jake Abel ... Mark James
- Jeff Hochendoner ... Sheriff James
- Patrick Sebes ... Kevin
- Greg Townley ... Number 3
- Reuben Langdon ... Number 3's Guardian
- Emily Wickersham ... Nicole
- Molly McGinnis ... Receptionist
- Brian Howe ... Frank
- Andy Owen ... Bret
- Sophia Caruso ... Girl on Street
- Charles Carroll ... Sam's Stepdad
- L. Derek Leonidoff ... Mr. Berhman
- Garrett M. Brown ... Mr. Simms
- Sabrina de Matteo ... Physics Teacher
- Cooper Thornton ... Sarah's Dad
- Judith Hoag ... Sarah's Mom
- Jack Walz ... Sarah's Brother
- Bill Laing ... Demented Farmer
- Beau Mirchoff ... Drew
- Cody Johns ... Kern
- Isabella Robbins ... Teen At Party
- Tucker Albrizzi ... Tuck
- Karen Allen ... Sam's Mom (scenes deleted)
- Megan Follows ... Supermarket Cashier
- William Kania ... Carnival Patron
- Doug Michaels ... Student / Party Boy
- Brenna Roth ... News Reporter
- Zoe Simek ... Girl in Classroom
- Michelle Vezzani ... Carnival Patron
- Morgan Wolk ... Teen #1
