AceShowbiz - Scarlett Johansson and Chris Hemsworth turned heads at the red carpet premiere of their animated film, "Transformers One", in London. Johansson, known for her stylish ensembles, opted for a figure-hugging off-the-shoulder rust-red Saint Laurent gown that perfectly matched the autumn equinox. The intricate tulle gown featured ruching details and complemented her warm, smoky makeup look.

Johansson's co-star, Hemsworth, looked dapper in an all-black tailored suit, complete with a silver chain and ring. He voices the character Orion Pax, who later becomes Optimus Prime, the supreme commander of the Autobots.

The cast was joined by fellow voice actors Brian Tyree Henry as Megatron and Keegan-Michael Key as Bumblebee. Henry sported a unique outfit, including a customized leather jacket emblazoned with "Such heroic nonsense, Megatron 196." Key exuded elegance in a gray suit and patterned tie.

In "Transformers One", Johansson plays the role of Elita One, a devoted Autobot and powerful warrior. The film follows the younger versions of Optimus Prime and Megatron as they develop a close friendship before becoming sworn enemies. It marks the first animated installment in the Transformers franchise since 1986's "Transformers: The Movie".