She also snapped a shot of Brolin flashing the 'sign of the horns', which has many meanings, although the actor has been known to do it more in recognition to the rock n' roll side of his personality.
Comedic touch: The man behind the mask of Thanos in the Marvel Cinematic Universe would also stick his tongue out for the sea of photographers on the red carpet While on the red carpet, Brolin appeared to be in a jovial and playful mood.
The mother of two, who gave birth to the couple's second daughter, Chapel, 15 months, also went with a paisley-pattern, only she stepped out in a purple sparkling gown, with a plunging design, from Etro.
Kathryn confessed she was 'obsessed' with her Etro dress, in a photo of herself striking a fashionable pose before leaving to the event.