Sienna Miller, 44, was seen in Barcelona wearing a prominent diamond ring only a week after delivering her third child in May. The sighting suggests she is engaged to her boyfriend of nearly five years, 29‑year‑old actor Oli Green, marking what would be her fourh engagement.

Diamond ring spotted in Barcelona a week after May birth

According to the source, Miller displayed the ring while strolling through Barcelona,smiling broadly and appearing "like she was walking on air." The timing—just seven days after the birth—has fueled speculation that the couple moved quickly to formalise their relationship.

Fourth engagement for Miller despite three prior broken vows

The actress has never married, despite previous high‑profile engagements to Jude Law in the early 2000s, Tom Sturridge in 2012, and art‑gallery director Lucas Zwirner in 2020. As the source notes, each past engagement ended without a wedding, leaving Miller as one of Hollywood’s most famously unwed stars.

15‑year age gap between Miller and Green sparks talk

Friends highlighted the 15‑year age difference, noting that Green has long expressed a desire to marry Miller. the source quoted a confidante saying Green "knows what a catch Sienna is and wants to make her his wife," underscoring how the age gap has beome a talking point in media commentary .

Friends hope this time is ‘fourth time lucky’

One insider described the couple as "ridiculously in love" and said they have a "lovely family" already. The same friend added that they hope this engagement will finally lead to a wedding, coining the phrase "fourth time lucky" to capture the sentiment.

Will Miller finally marry after three broken engagements?

The lingering question remains whether Miller will walk down the aisle this time. no official statement from Miller or Green has confirmed the engagement , and the identity of the newborn’s sex and name remains undisclosed, leaving fans to await further clarification.