Eden, 28, married husband Cameron Crosby on Sunday after nearly three years together.
Josh announced his daughter’s nuptials with a heartfelt message on Monday, sharing on Instagram that he was “awed” after the ceremony.
Share a photo of the couple driving a car together on the big day, with the Yellowstone smiling in her wedding dress and Josh absolutely dapper in a cowboy hat and suit, the Deadpool 2 star wrote a lengthy reflection on the new milestone in the family’s life.
“When your daughter gets married, everything comes out: the memories, a life lived (or not), and the resonance of certain relationships,” he wrote.
RELATED: Josh Brolin Reveals Daughter Eden, 24, Is Engaged: ‘Couldn’t Be More Proud’
Describing sitting outside with his coffee the morning after the wedding, listening to the sounds of wildlife, Josh said he got sentimental thinking about “the biggest, most intimate wedding ceremony I’ve ever seen “.
“It was all real and as diverse as the personalities involved were, it was all selfless, connected and directed towards the wedding couple,” Josh wrote.
Never miss a story – subscribe to Free PEOPLE Daily Newsletter to stay up to date on the best that PEOPLE has to offer, from juicy celebrity news to gripping human interest stories.
The marriage also made Josh reflect on the experience of watching his older children build lives while raising his young ones. Josh shares Eden and her older brother Trevor33, with his ex-wife Alice Adair, whom Brolin divorced in 1994. Josh also shares two young daughters with his wife Kathryn Boyd Brolin, Westlyn Rain3 and grace of the chapel, 16 months. The couple married in 2016.
“I’m so grateful for this time and this place to be able to enjoy this moment,” Josh wrote. “I have small children to raise again, whole lives to look after and to be sensitive to.”
Josh also shared how much it meant to him to still be an active parent in Eden’s life and to spend such an important day by her side.
“I didn’t get old and I didn’t go to Italy. I stayed and accompanied my daughter in the grassy countryside to an engagement – a groom with tears streaming down his cheeks – and I just melted into that, into it,” Josh explained.
Eden and Crosby, an actor, announced their engagement in August 2018, when the actress showed off her stunning emerald engagement ring as she and Crosby raised their middle fingers to the camera. She accompanied the message with a few words from the Sufi poet Rumi.
The duo began their romance in 2016. Eden opened up about her love for her husband in a post celebrating their first anniversary in 2018.
“He’s literally the coolest, kindest, most interesting person I know,” Eden said in his caption. “Boy, I’m a lucky girl to love this boy.”
Before Crosby proposed in 2018, he reportedly asked Josh’s permission to propose in a heartfelt phone call. Announcing the engagement in an Instagram post at the time, Josh gushed over the couple and said he “couldn’t be more proud, more moved or more relieved”.
RELATED VIDEO: James Brolin Says Son Josh ‘Gave Up Everything’ When Daughter Was Born
“My granddaughter is getting married, at the request of a guy I adore. Imagine that? A guy I have a strong feeling for will look out for his best interests, the safety of his heart,” Josh said. “Congratulations to you two.”
Fast forward nearly two years to the wedding day, and Josh’s deep, sentimental emotions have only grown. Describing himself as “ripped” the morning after the wedding, Josh highlighted how he felt struck in the moment by life’s blessings and mysteries.
“We fluctuate in a lifetime. We die and are born again and again in a mystery that is never solved,” Josh explained. “My son and my daughters are happy, content. All the greatest gifts have no form and are waiting to be recognized.”