Archie Renaux and longtime love Annie O’Hara are engaged. The ‘Alien: Romulus’ star, 26, and his partner are thrilled to be planning their nuptials. Without spilling too many details, Archie told PEOPLE: “We’ve got a few things to plan and get ready for in this next year.” The couple have three-year-old daughter Iris together, who will have a part to play on their special day. He said: “She goes to school next September … so she’ll certainly have a job I’m sure.” The ‘Shadow and Bone’ star and his fiancée started dating towards the end of 2019, and made their red carpet debut at the UK premi…