Keegan-Michael Key voices B-127, a younger version of Bumblebee, in the upcoming film 'Transformers One,' which explores the origin story of Optimus Prime and Megatron. The film, distributed by Paramount Pictures, depicts how the two iconic characters were once allies before becoming adversaries. Key describes his voice for B-127 as a higher, more excitable version of himself, and he employs physical actions in the recording booth to enhance the authenticity of action scenes. The character's optimistic outlook is a source of inspiration for Key, who finds the role liberating compared to live-action performances. 'Transformers One' features a star-studded cast including Scarlett Johansson, Chris Hemsworth, and Brian Tyree Henry. The movie is set to be the first fully CG-animated installment in the Transformers franchise.