"Transformers 4" director Michael Bay has released the first picture of Mark Wahlberg and largely unknown Irish co-star Jack Reynor in costume on the set of Paramount's upcoming sequel.
See video: 'Transformers 4': First Look at the Explosions You'll be Paying to See Next Year
"Just another day on the set of 'Transformers 4,'" Bay wrote on his blog along with picture of himself, Wahlberg, and the camera crew.
The follow-up to "Transformers: Dark of the Moon" — which grossed $1.12 billion at the global box office — features almost an entirely new cast, including franchise newcomers T.J. Miller, Kelsey Grammer, Sophia Myles, Nicola Peltz, Li Bingbing and Hen Gang.
The film takes place four years after the last, but the plot details remain a mystery.
