Sienna Miller hides 35‑week pregnancy while filming War’s intense scenes.

**Sienna Miller Was 35 Weeks Pregnant While Filming Divorce Drama “War”**

Sienna Miller said she was 35 weeks along when the final scenes of the new legal drama *War* wrapped up. The 44‑year‑old, who welcomed her third child with partner Oli Green in April, kept the pregnancy a secret from most of her crew until after filming finished.

Her story shows how a busy Hollywood mother can juggle a tight shooting schedule and late‑stage pregnancy.

The series pits Miller’s Carla Duval against Dominic West’s Morgan Henderson, tracing the ugly fallout of their divorce in two London law firms battling for victory. Fox and Miller were on set together, both pregnant; Fox’s pregnancy was written into the script.

Miller told The Observer that the long days felt “leaving and coming home in the dark,” her resilience.

Miller’s personal life has been a whirlwind: she and Green, 29, have already welcomed two children – a toddler in January 2024 and a newborn in April – and got engaged two months after the baby’s birth. She also shares a 14‑year‑old daughter, Marlowe, with actor Tom Sturridge, with whom she dated for four years until July 2015.

Her recent comments about motherhood and fashion—“I have completely lost my fashion sense…”—underscore the everyday challenges she faces as a working mom.

## Background & Context

*War* follows Carla Duval’s battle against her estranged husband, Morgan Henderson, in a courtroom drama that pits elite London law firms against each other. Miller plays the lead role of Carla, while West portrays Morgan.

The show delves into the ugly fallout of their divorce, offering a dramatic backdrop for Miller’s real‑life pregnancy.

Miller’s pregnancy coincided with the entire shooting schedule of the series. At the end of production she was 35 weeks pregnant, a fact she only disclosed after filming wrapped. She confirmed that Phoebe Fox, her co‑star in *War*, was also pregnant; Fox’s pregnancy was incorporated into the storyline.

Miller recalled the grueling days: “long days of filming which saw me ‘leaving and coming home in the dark’.” The production team had to accommodate her condition while maintaining the show's pace.

Miller’s personal timeline includes her third child, born in April with partner Oli Green. The couple became engaged two months later, and a second baby arrived in January 2024. In addition to her own children, she has a 14‑year‑old daughter, Marlowe, with actor Tom Sturridge, whom she dated until July 2015.

## What the Actress Had to Say

Miller said she feels like a “lactating heifer” after being pregnant or breastfeeding for nearly four years.

She joked that her “massive boobs” made dressing difficult: “I also have massive boobs, which I don’t know how to dress.” In an interview with, she explained that on the day of the interview she had been up breastfeeding “since the crack of dawn.”

She also revealed that she turns to model Alexa Chung—Tom Sturridge’s partner—for fashion advice, . When asked about motherhood fatigue on Jimmy Fallon, Miller admitted: “It feels like stringing sentences together is a bit challenging.

I’m on very little sleep but I’m madly in love with my baby.” She described the difficulty of balancing her roles: “I’ve been pregnant or breastfeeding for nearly four years, and I think something happens to the brain… that you sacrifice your identity.”

Miller also admitted to feeling exhausted to the point of losing herself: “I have completely lost my fashion sense… you’re just ‘mother’… and not in the Gen‑Z way, as much as I would like to be.” She said she “doesn’t know who she is” because of the constant demands of raising a teenage daughter, a toddler, and a newborn.

## The Show’s Availability and Next Steps

*War* will stream in the UK on October 2 on Sky and Now. Miller’s performance as Carla has been praised for its intensity amid her personal challenges. After giving birth, she appeared on *Jimmy Fallon* in New York only three weeks later, speaking candidly about motherhood’s toll.

During the interview, when asked which of her children is toughest to look after, Miller compared her teenage daughter and the toddler: “I would have said the teenage girl would be harder to juggle until the transatlantic flight I took yesterday with the toddler and the newborn. The toddler now wins hands down.

It was an absolute disaster.” She ended by admitting, “There’s no negotiating. I got to the immigration line and just broke down.”

Miller’s recent piece added that she had wanted another baby for a long time, and her postpartum experience was blissful.

She recalled thinking that by age 40 she wouldn’t have another child, yet she was “just euphoric” and felt “existentially relieved.” Her story illustrates the complex balancing act of an actress who continues to push forward in her career while raising a rapidly growing family.

Sienna Miller’s revelation that she was 35 weeks pregnant during the entire shoot of *War* highlights the demanding reality of working moms in Hollywood. As her third child arrives, she continues to navigate the challenges of motherhood, fashion, and a high‑profile acting career—all while delivering compelling performances on screen.