Cast
Ewan McGregor as Obi-Wan Kenobi, a Jedi Knight and mentor to his Padawan learner, Anakin Skywalker, who investigates the assassination attempt upon Padmé, leading him to discover the production of a Clone trooper for the Galactic Republic. In the 10 years since The Phantom Menace, he has grown wiser and more powerful in the use of the Force.
Hayden Christensen as Anakin Skywalker, a 20-year-old former slave from Tatooine and Obi-Wan's gifted Padawan apprentice who is assigned to protect Padmé, with whom he falls in love. He is believed to be the "chosen one" of Jedi prophecy destined "to bring balance to the Force." In the 10 years since The Phantom Menace, he has grown powerful but arrogant, and believes that Obi-Wan is holding him back. A large search for an actor to portray Anakin Skywalker was performed. Lucas auditioned various actors, mostly unknown, before casting Christensen. Among the many established actors who auditioned or considered were Jonathan Brandis, Chris Klein, Devon Sawa, Charlie Hunnam, Topher Grace, Nick Swardson, Rob McElhenney, Eric Christian Olsen, Joshua Jackson, Erik von Detten, James Van Der Beek, Ryan Phillippe, Colin Hanks, and Paul Walker. Leonardo DiCaprio also met with Lucas for the role, but he declined as he felt he "wasn't ready to take that dive". He eventually went on to star in Catch Me If You Can (2002) and Gangs of New York (2002) instead. Christensen initially thought the role was to go to another actor as he had heard numerous other actors being considered. Co-star Natalie Portman later told Time magazine that Christensen "gave a great reading. He could simultaneously be scary and really young."
Natalie Portman as Padmé Amidala, the former Queen of Naboo, who has recently been elected the planet's Senator, and Anakin's love interest.
Ian McDiarmid as Palpatine / Darth Sidious, a former senator from Naboo, as well as a secret Sith Lord, who amasses vast emergency powers as the Supreme Chancellor of the Galactic Republic upon the outbreak of the Clone Wars.
Samuel L. Jackson as Mace Windu, a Jedi Master sitting on the Jedi Council who warily watches the Galactic Senate's politics.
Anthony Daniels as C-3PO, a protocol droid built by Anakin as a child who now serves the Lars family on Tatooine.
Kenny Baker as R2-D2, Anakin's astromech droid who often accompanies him and Obi-Wan on missions.
Frank Oz as Yoda, the centuries-old Jedi Grandmaster of an unknown alien species. In addition to leading the Jedi Council, Yoda is the instructor for the young Jedi Padawans/"Younglings".
Temuera Morrison as Jango Fett, a bounty hunter who gave his DNA for use by the cloning facilities on Kamino for the creation of the clone army.
Christopher Lee as Count Dooku / Darth Tyranus, a former Jedi Master and the old mentor of Obi-Wan's late master Qui-Gon Jinn, who is now the puppet leader of the Separatist movement as well as Darth Sidious' new Sith apprentice and a suspect in Obi-Wan's investigation.
Pernilla August, Ahmed Best, Oliver Ford Davies, and Andy Secombe reprise their roles from The Phantom Menace as Shmi Skywalker, Jar Jar Binks, Sio Bibble, and Watto, respectively. Silas Carson also reprises his role from that film as both Nute Gunray, the Viceroy of the Trade Federation; and Ki-Adi-Mundi, a Cerean Jedi Master sitting on the Jedi Council. Jimmy Smits portrays Bail Organa, a senator from Alderaan. Daniel Logan portrays a young Boba Fett, Jango Fett's clone and adopted son.
Jack Thompson, Joel Edgerton and Bonnie Piesse appear as members of the Lars family and homestead; respectively as Cliegg Lars, Shmi's husband, Owen's father and Anakin's stepfather; Owen Lars, Cliegg's son, Shmi's stepson, and Anakin's stepbrother; and Beru Whitesun, Owen's girlfriend. Leeanna Walsman appears as Zam Wesell, a shapeshifting Clawdite bounty hunter and partner of Jango Fett, who was given the task of assassinating Padmé. Jay Laga'aia appears as Gregar Typho, Padmé's newly appointed captain of security. Rose Byrne and Alethea McGrath briefly appear as Dormé, Padmé's handmaiden and as Jocasta Nu, the librarian at the Jedi Temple, respectively. Ronald Falk provides the voice of Dexter Jettster, Obi-Wan's Besalisk friend who runs a diner on Coruscant and informs him about Kamino.
Daniels and Best also make cameo appearances as Dannl Faytonni and Achk Med-Beq, respectively, attendees of the Coruscant Outlander Club who witness Anakin and Obi-Wan capturing Zam Wesell. E! reported that Lucas had asked NSYNC to film a small background cameo appearance, in order to satisfy his daughters. They were subsequently cut out of the film in post-production, although briefly visible during a crowd shot from above. David Duchovny turned down an undisclosed role in Attack of the Clones so that he could star in Evolution (2001). Ray Winstone auditioned for the role of Pádme's father but was dismissed after showing up drunk at the audition and the role eventually went to another actor but it was eventually cut from the film. The end credits erroneously list Alan Ruscoe as playing Neimoidian senator Lott Dod. The character was actually another Neimoidian, played by an uncredited David Healy and voiced by Christopher Truswell. Archival recordings of Liam Neeson as Qui-Gon Jinn from The Phantom Menace, appear as a disembodied ghostly voice heard by Anakin through the Force as he was slaughtering the Tusken Raiders; Qui-Gon also appears earlier in the film in the form of a statue in his likeness during a background scene when Obi-Wan visits the Jedi Archives. Fiona Johnson reprised her The Matrix (1999) role as the Woman in the Red Dress in an Easter egg cameo appearance, with her character named "Hayde Gofai" in later Star Wars media, briefly offering a seductive look to Anakin Skywalker at the Outlander Club.