Sienna Miller and Oli Green have officially announced their engagement after four years of dating and welcoming two children together.The pair sparked speculation after the actress was spotted wearing a diamond ring while visiting Spain earlier this week.They first connected at a party in 2021 and went public in 2022, effectively managing a fifteen-year age gap while growing their family.Miller currently balances her professional acting career with the demands of parenting three children including her teenage daughter from a past relationship.