Sienna Miller and Oli Green announce the arrival of their second child, according to reporting that focuses on the couple’s relationship and public discussion about their age difference. The articles say the pair began dating in 2021 and that their 15-year age gap has been a frequent topic in public commentary since then. One of the accounts frames Miller, who is reported to be 44, as embracing the gap in contrast to earlier relationship discussions involving older partners. The coverage centers on the couple’s current family news and the way media attention has followed the relationship since its start, rather than detailing the birth itself. Across the sources provided, the main shared points are that Miller and Green are expecting or have welcomed a second child, that they have been together since 2021, and that their age gap—reported as 15 years—is part of the ongoing public conversation. No additional, consistent information about timing, location, or other personal details is included in the excerpts.