Character

Humans

Sam Witwicky

Sam Witwicky

The teenager who killed Megatron. In this film, Sam is trying to get some personal development, and have a normal life, getting over his world-saviour status, and out of the overprotection from his parents and Bumblebee. He attends an East Coast college to learn astronomy. During his time there, Sam starts having mental flashes about Cybertronian symbols that turn out to be the key to finding a source of energon on Earth, so now the Decepticons are after him to get that information.On July 27, 2008, LaBeouf was involved in a car crash, with fellow actress Isabel Lucas, and had to undergo hand surgery. The character getting burned in the story was an unrelated decision. LaBeouf said production was only delayed by two days after his accident because Bay made up for it by filming second unit scenes, and he recovered from the accident a few weeks earlier than expected, allowing him to return to the set. Bay had suggested the hand injury would be written into the story, and Orci said on-set rewrites were done to protect his hand for the remainder of the shoot. Towards the end of filming though, LaBeouf injured his eye when he hit a prop, which required seven stitches. He resumed filming two hours later.

 

Mikaela Banes

Mikaela Banes

Sam's girlfriend, who cannot afford to attend college with him. She works alongside her father, Cal, at a motorcycle repair shop. Fox cannot ride bikes in reality and had to have someone push her vehicle around as she rode on them. Fox had lost a lot of weight for her role in Jennifer's Body, and had to gain ten pounds within two weeks. She explained"Michael doesn't like skinny girls."

 

William Lennox

William Lennox

a U.S. Army Ranger and ally of the Autobots. Since the 2007 film Lennox has become part of NEST, an international taskforce battling Decepticons with the Autobots.

Leo Spitz

Leo Spitz

Sam's college roommate who owns a website on conspiracy theories. He accompanies Sam and Mikaela all the way to Egypt. Rodr¨ªguez endured 100 mph winds created by fans while filming in Egypt, which resulted in him dislocating his shoulder and having to spend 45 minutes having his eyes flushed of sand. At some point, the character was supposed to be called "Chuck" and Jonah Hill was considered for the role.

 

Seymour Simmons

Seymour Simmons

former agent of the terminated Sector 7 unit, which monitored Transformer activity on Earth.He is now off-duty, working in his mother's deli restaurant when Sam enlists his aid. He joins Sam's group and is responsible for the destruction of Devastator.Turturro was allowed to climb the real pyramids during filming.

Autobots

Optimus Prime

The Autobot leader. He retains his alternate mode of a blue Peterbilt truck with red flame decals. Cullen recorded a voiceover for the opening scene in August 2008, but began the majority of voice work in November.Originally, a cameo was written for Cullen, but it was not included in the final cut of the film.

Bumblebee

Bumblebee

The Autobot who befriended Sam and disguises himself as his fifth-generation Chevrolet Camaro. Despite being repaired at the end of the 2007 film Bumblebee's voice is still malfunctioning, and he still uses radio soundbites to express some of his emotions. It is explained in the companion comic series that Starscream damaged them again in a fight after they were repaired.Mark Ryan reportedly reprised his role as Bumblebee from the 2007 film, but ultimately, no spoken lines by the character were included in the finished film. Ryan also continued his role as stand-in for the robots on set. The filmmakers updated his previous appearance as the 2006 Camaro Concept based on the Super Sport version of the 2010 production model. Ed Welburn, vice president of GM Global Design, said the redesigned car emphasized Bumblebee as becoming stronger after having his severed legs reattached in the 2007 film: the new intakes and spoilers show he is a sturdier character.

 

Mudflap and Skids

Mudflap & Skids

Also known as the twins. These Autobot infiltrators transform respectively into a red Chevrolet Trax and green Chevrolet Beat. Mudflap is very hyperactive, while Skids believes himself to be the smarter of the two and tries to come across as mature, but nevertheless appears unable to keep quiet.Skids and Mudflap share an almost psychic link which enables them to coordinate their attacks in battle, when they are not bickering among themselves. Bay compared the message of the bumbling but heroic characters to the story The Little Engine That Could. He chose the Beat and Trax for the Autobot twins because he thought those two small cars looked good together.Ed Welburn added when they had designed the cars before Bay selected them, the "character" they wanted to bring to the concepts was a sense that small cars could be as cool as large ones. The twins have the ability to combine. They start the film by combining into a pink and white ice cream van,and although it was dropped at some point during production, it was initially said that they would have the ability combine to form a bigger robot. Wilson previously voiced Frenzy in the 2007 film. Jess Harnell voices Ironhide, the Autobot weapons specialist who transforms into a GMC Topkick.

Ironhide

Ironhide

The Autobot weapons specialist who transforms into a GMC Topkick.

Sideswipe

Sideswipe

A silver Chevrolet Corvette Stingray Concept. Having wheels for feet, he moves around skating, similarly to the way Bonecrusher did in the 2007 film. He is an expert fighter with his swords and tries to get in close with his opponents. At BotCon 2009, the film writers said Sideswipe was originally scripted to be a Lamborghini as he was in G1, but Bay had his choice of cars and went with the Stingray.

Decepticons

Megatron

Megatron

The Decepticon leader. Despite Michael Bay's initial claims of him not returning after he was killed and thrown into the Laurentian Abyss in the 2007 film, Megatron is resurrected by the Decepticons with an AllSpark shard as a Cybertronian tank, although in some adaptations of the film he can also change into 2007's Cybertronian jet mode, making him a Triple Changer in the film series. He has become stronger as a result of absorbing the AllSpark that originally killed him. When reviving the character, the writers chose not to rename him Galvatron so as to not confuse the general audience.

Dynasty of Primes

Dynasty Of Primes

One of the Dynasty of Primes and Megatron's master. He is the one who corrupted Megatron into forming the Decepticons.He had been trapped in another dimension and was able to communicate with the Decepticons via an interdimensional window. The image of his face, seen through this window, served as inspiration for the Decepticon insignia. He is capable of opening Space Bridges at will. Lorenzo di Bonaventura compared The Fallen to Judas Iscariot. Although he lacks any alternate mode in the film, his toy versions transform into a Cybertronian aircraft. The writers selected The Fallen after looking through various cartoons and comics for new characters, because he was the most "elemental" villain.At some point, Leonard Nimoy and Frank Welker were considered for voicing the Fallen.

Starscream

Starscream

The air commander who transforms into an F-22 Raptor. He flew into space at the end of the previous film, and returns bearing Cybertronian symbols on his body and commanding a new Decepticon army. Chris Mowry, writer of the comic book prequels, stated Starscream differs from his 1980s incarnation because "His motivations are more for the species. He's definitely at odds with what Prime and Megatron have been doing. He thinks that they've both been consumed with greed, for their own selfish reasons, but as he finds out, his plans start to fall through as he¡¯s kind of becoming overwhelmed with the same greed that they had." However, Orci explained that Starscream would have more dialogue than in the 2007 film,and that dialogue additions during post-production edged Starscream closer towards his 1980s counterpart.

Ravage

Ravage

A minion of Soundwave that resembles a large one-eyed jaguar. In the movie, Ravage is seen deploying a load of marble-sized bots that adopt an intermediate bug-like robot form, and end up grouping together to form a razor-thin robot named Reedman (vocal effects provided by Frank Welker

Scalpel

Scalpel

A small spider-like robot who turns into a microscope. He is a medic and scientist equipped with tools he is seen using to torture Sam. The packaging of his Scout-Class figure details he is skilled in dissecting and rebuilding almost any living organism.

Demolishor

Demolishor

Who transforms into a white and red Terex O&K RH 400 hydraulic mining excavator.In robot mode, his treads turn into huge wheels, enabling him to roll either on the two of them, or only on the front one, with the rear one lifted behind his head. During production, the film writers simply called him "Wheelbot", and he is erroneously listed by that name in the film's credits. Also, he is referred to as "Demolisher" in the film novel.

Rampage

Rampage

Who transforms into a red Caterpillar D9L bulldozer. His robot mode resembles an upright-standing snake with his treads coming out of his hands, which he uses as whips. In the toy line, this mode is called "jackhammer mode", with his actual robot mode resembling a centaur with four spider-like legs. Due to the fact that he moves around by jumping, during production he was known as "Skipjack", and is erroneously listed by that name in the film's credits.

Devastator

Devastator

A 46?feet (14?m) tall (hunched over) massive robot formed by several combining construction vehicles, who walks in a four-legged fashion resembling a gorilla.He is physically unable to stand upright, but would be 100?feet (30?m) to 120?feet (37?m) tall if he did.His jaws can open up to form some sort of suction vortex, and he seems to have grappling hooks he is seen using to climb a pyramid. In the 2007 film, the name "Devastator" was mistakenly given to Brawl, a tank.
Although Devastator was originally conceived to be made up of the other Constructicons (which is also reflected in the toy line) in the film Devastator was made to be independent from them, and his components are never seen to adopt any individual robot modes. As a result of this change, Overload lost his once intended robot mode, only to be seen as a vehicle.
The vehicles that make up Devastator are: