Sienna Miller has embraced motherhood with great joy as she now navigates life with three children, including a baby boy born in early 2026. The actress, known for her roles in various films and her presence in the fashion world, shares her oldest daughter, Marlowe Sturridge, with her ex-partner Tom Sturridge. Miller’s journey into parenthood began in July 2012, and she has since welcomed a second daughter and a son with her current boyfriend, Oli Green.
Miller’s first foray into motherhood came when she and Sturridge welcomed their daughter, Marlowe. Reports of their pregnancy began circulating in early 2012, but Miller remained discreet about the news initially. She was later seen proudly showcasing her baby bump during an event in New York City that March. Marlowe’s birth was confirmed by Miller’s sister, Savannah, on social media, when she simply expressed her love for the new arrival.
Although Miller has made efforts to shield Marlowe from the limelight, she occasionally shines a light on their unique bond. Reflecting on her experience of motherhood, the actress noted in a 2014 interview that the connection she felt with her daughter was transformative. “It was like, ‘There you are — that’s what I’ve been missing,’” she shared. Despite the challenges that come with single parenthood following her breakup with Sturridge in 2015, Miller has embraced the chaos that motherhood brings.
Throughout her career, Sienna Miller has often discussed the complexities of balancing work and motherhood. In a candid conversation with Vogue UK post-breakup, she admitted to feeling overwhelmed by the dual pressures of parenting and professional responsibilities. Miller articulated the inherent guilt that comes with motherhood, describing it as an emotion both familiar and perplexing.
Marlowe Sturridge has made infrequent public appearances with her mother but has been spotted at various events, including the International Medical Corps Annual Awards Celebration and New York Fashion Week in February 2023. The growing young girl recently joined Miller and Green at the Cannes Film Festival in May 2024, showcasing not only her family’s support for Miller but also her own emerging presence in the public eye.
Miller’s second child, a daughter with Oli Green, was first hinted at during a beach outing in Ibiza in August 2023, which prompted speculation about her pregnancy. In discussions about her desires for a bigger family, Miller spoke candidly about the immense societal pressure she felt regarding motherhood as she approached her 40s. In a 2022 interview, she revealed how she had even frozen her eggs, emphasising the biological challenges that women face. However, she expressed a more relaxed outlook as time passed, thinking, “If it happens, it happens.”
The actress formally announced the birth of her second daughter in January 2024, shortly after being photographed with her newborn during a stroll with Green. Later that year, during a Vogue interview, she disclosed that she was expecting a baby girl, accidentally referring to her unborn child as Marlowe’s “baby sister,” which added to the excitement surrounding her growing family.
In December 2025, just over a year after the arrival of her second daughter, Miller revealed her pregnancy with her third child, again with Green. This announcement was made public during the London Fashion Awards, where she showcased her baby bump in a stunning sheer white gown. Though details surrounding the pregnancy remained private initially, Miller later expressed her love for her newborn in a May 2026 interview with E! News, alluding to the sleepless nights that accompany a new arrival.
It was in August 2026 when Miller finally confirmed that her new child was, in fact, a boy, bringing her total number of children to three. During her conversation with Vogue UK, she described this unexpected joy as a “surprise” and a euphoric experience. She highlighted the serenity that came with her new role as a mother of three, feeling an overwhelming sense of relief and happiness.
Sienna Miller’s journey through motherhood reflects both the challenges and triumphs of parenting. As she balances her thriving career with her expanding family, the actress continues to share pieces of her life with the public, illustrating the beautiful yet complex realities of being a mother.