By Rachel Mcgrath For Dailymail.com
Published: 05:04 GMT, 4 November 2020 | Updated: 05:15 GMT, 4 November 2020
He's expecting a second baby with wife Kathryn Brolin.
But on Tuesday, it was his firstborn, daughter Westlyn, who was the focus of Josh Brolin's attention - and affection.
The Hollywood star, 52, posted a long tribute to the little girl on his Instagram as he celebrated her second birthday.
Doting daddy: Josh Brolin posted a long tribute to his daughter Westlyn on Instagram on Tuesday as she turned two
He shared a photo of the blonde toddler and went on to wax lyrical about his love for her.
'In 2 years you have transformed this family,' he wrote. 'A laugh is an earthquake of joy, and your tears lacerate me to the bone.'
The Avengers star went on: 'Two years old and your soul shines like you've been here a hundred times before.
'We are lucky to know you, little girl.... we love you like a fiery sunset, like the fish that comes to peek at the surface of the water then dives deep into the reveal of an explosively colorful sea that you understand better than any of us.'