Will Arnett’s romantic life has taken a quietly dramatic turn, and today’s headlines unveil an unexpected yet quietly impactful shift in his private world. The Arrested Development star has entered a new chapter, romantically linked to supermodel and environmental advocate Carolyn Murphy.

This follows a discreet breakup last year with his long-term girlfriend Alessandra Brawn, with whom he shares their five-year-old son, Denny. According to People, the separation occurred in late 2024, and despite the change in their personal lives, Arnett and Brawn remain committed to co-parenting amicably.

The romance between Arnett, now 55, and Murphy, 51, came into view when the two were spotted together in late August attending the West End play Good Night, Oscar in London.

In a candid backstage Instagram snapshot shared by Sean Hayes, they appear smiling alongside Hayes and his husband, offering the public a rare peek into this new pairing.

Murphy’s credentials are as impressive as they are multifaceted: she is a longtime Estée Lauder ambassador, a Vogue cover veteran, and a passionate advocate for environmental causes.

The end of Arnett’s relationship with Alessandra Brawn brings closure to a six-year partnership. Reports confirm that the duo began dating in 2019 and shared several joyful family milestones—most notably the arrival of their son, Denny, in May 2020.

Despite splitting late last year, they have continued to prioritize co-parenting. Their separation has been described as quiet and amicable, with both individuals maintaining a forward-looking, respectful approach.

While Arnett and Brawn’s romantic chapter has ended, their co-parenting arrangement remains harmonious. During an April episode of SmartLess, Arnett praised their parenting dynamic, describing Brawn as “awesome” and someone with whom he routinely consults on decisions both big and small.

His remarks highlighted the deep level of trust between them—even as their relationship as a couple concluded.

Arnett’s broader family life remains a cornerstone for him. In addition to Denny, he is the devoted father of Archie (16) and Abel (15), his two teenage sons with ex-wife Amy Poehler. Despite their divorce—finalized in 2016 after nearly a decade-long marriage—the former couple uphold a strong co-parenting relationship, underscored by mutual respect and collaboration.

Poehler even appeared recently on SmartLess, reinforcing their enduring bond. terviews, he’s spoken candidly about how the experience changed his outlook and brought clarity to his life.

He shared that becoming a dad at age 38 shifted his focus, and that managing a bustling household—“a zoo,” as he jokingly described it—became his new normal.

Amid his personal developments, Arnett remains driven professionally. He continues to co-host the successful podcast SmartLess alongside Jason Bateman and Sean Hayes, a platform that showcases his trademark humor and reflective side.

Adding to his momentum, Arnett stars in the upcoming comedy film Is This Thing On?, directed by Bradley Cooper. He plays a struggling comic navigating personal challenges—a role that mirrors Arnett’s own creative roots. The film is set to world premiere at the New York Film Festival on October 10, 2025, and will hit theaters in December.

At its heart, this story isn’t just about a high-profile breakup or new romance—it’s a portrait of maturity, balance, and evolution. Arnett and Brawn’s separation shows that relationships can end gracefully, grounded in respect rather than drama, and that priorities like shared parenting can transcend romantic transitions.

Meanwhile, Arnett stepping into a relationship with Carolyn Murphy signals a new season. Her stature as a celebrated model and advocate complements his creative world, and their recent public appearance together suggests this partnership is already grounded in ease and shared connection.

Through it all, Arnett’s equilibrium—strengthened by fatherhood, career adaptability, and personal growth—remains steadfast. Whether navigating the stage of life with teenage sons, nurturing a toddler, or exploring a fresh romance, he approaches these chapters with self-awareness and intention.

As Is This Thing On? prepares to debut and Arnett’s new relationship blossoms, fans are reminded of his resilience—on screen, on air, and in life.