Sienna Miller Ends 8-Year Instagram Hiatus to Share New Baby Bump Milestone

After an eight-year hiatus, actress Sienna Miller returns to Instagram with a baby bump selfie, confirming she is expecting her second child with Oli Green.

By: AXL Media

Published: Mar 21, 2026, 5:59 AM EDT

Source: People

A Strategic Return to Social Media

Miller’s return to Instagram ends a hiatus that began in June 2017. Her first post back featured a cozy low-angle selfie in a DiorAlps Fair Isle sweater and beanie, putting her "D-line" front and center for her followers. To lighten the mood of her return, she included a meme of director David Lynch—specifically his famous "No" response when asked to elaborate on a film—and a second meme poking fun at her own digital reappearance. Longtime friend and actor Justin Theroux welcomed her back with a sarcastic comment: "omg the non-stop posting w you! It's relentless."

Growing the Miller-Green Family

This pregnancy marks the second child for Miller and 29-year-old actor/model Oli Green, who have been dating since 2022. The couple welcomed their first daughter together in late 2023 (who is currently 23 months old). Miller is also mother to 13-year-old Marlowe, whom she shares with her former partner, actor Tom Sturridge. Despite her public career, Miller has remained protective of her youngest daughter's privacy, having not yet publicly revealed the toddler's name.

Breaking Taboos: Motherhood in the 40s

Miller has been an outspoken advocate for women navigating the biological pressures of their 40s. In a 2022 interview with Elle UK, she described the decade as "incredibly cruel" for women regarding fertility and revealed she had frozen her eggs at 40 to alleviate "existential threat" and anxiety. In her 2026 return, she reiterated her desire to normalize late-age pregnancy, telling Vogue she wants to reach a point where she doesn't feel the need to "make a joke" about being an older mother to show she’s "in on the joke."