In the 2007 film 'Transformers', what is the name of the leader of the Autobots?

In the 2007 film 'Transformers', Optimus Prime is the leader of the Autobots. He arrives on Earth with other heroic Cybertronians while searching for the AllSpark, an artifact capable of creating or transforming robotic life.

Optimus leads the Autobots in their war against the Decepticons, commanded by Megatron. His role combines battlefield authority with a strong moral code: he seeks to protect humans and opposes using the AllSpark as a weapon of domination.

In the live-action film, Optimus transforms into a Peterbilt 379 semi-truck. His red-and-blue design, faceplate, and distinctive vehicle form adapt familiar features from the earlier Transformers toy line and animated series while giving him a more cinematic appearance.

Starscream is Megatron's ambitious lieutenant, Bumblebee is an Autobot scout, and Megatron leads the opposing Decepticons. Those characters are central to the film, but none is the Autobots' commander. Peter Cullen provides Optimus Prime's voice, continuing his long association with the character.