Naomi Watts is joyfully marking a significant milestone in her son’s life, Sasha Schreiber, as he turns 18 years old. This momentous occasion is more than just a birthday; it symbolizes the transition into adulthood, filled with opportunities and new responsibilities.

The acclaimed actress, known for her remarkable role in 21 Grams, took to Instagram to share a heartfelt tribute on July 25, showcasing rare and cherished photos of her and her son, whom she lovingly shares with her former partner, Liev Schreiber. These glimpses into their relationship highlight the bond they share as mother and son.

“Happy birthday sweet, darling @sashapeteschreiber,” Naomi expressed in her Instagram carousel post. She reflected on the significance of this day, saying, “18 today—and ready for the world! Cannot believe it.” Her words resonate with pride and affection, celebrating not just the day but the journey they have taken together.

“Have so loved watching you grow into the kindest, most wonderful young man,” she continued, emphasizing the joy and fulfillment she has found in her role as a mother. “Thank you for making me a first-time mum.” This heartfelt sentiment underscores the profound impact motherhood has had on her life.

The 56-year-old actress, who also has a 16-year-old daughter, Kai Schreiber, with Liev, shared an array of images: a solo shot of Sasha showcasing how much he has matured, alongside three treasured photos of them together. These include a nostalgic picture of Naomi cradling her son as a baby, and two more recent images capturing their joyful smiles and connection.

Sasha’s 18th birthday celebration comes just over a month after a notable reunion between Liev and Naomi, who separated in 2016 after 11 years of partnership. They came together to celebrate Sasha’s high school graduation, accompanied by their current spouses, Taylor Neisen and Billy Crudup, respectively. This gathering reflects their commitment to co-parenting and maintaining a supportive family environment despite past challenges.