Key facts
- Sienna Miller was seen wearing a diamond ring in Barcelona.
- The ring is fueling speculation of an engagement to boyfriend Oli Green.
- Miller and Green have been together for nearly five years.
- The couple recently welcomed their third child.
Actress Sienna Miller has sparked speculation of a fourth engagement after being photographed wearing a sparkling diamond ring in Barcelona. The ring was seen on her left hand, fueling rumors that she is set to marry her actor boyfriend, Oli Green. Miller and Green have reportedly been together for almost five years and recently welcomed their third child. The sighting comes after a period of public attention on their relationship.