The Love Island runners-up were snapped enjoying the view of London's skyline before attending a film premiere in Haymarket.
The flick, called The Intent, has been produced by a friend of their fellow Love Island star Nathan Massey and they were more than willing to show their support.
Olivia and Alex coordinated in black for the event and looked picture perfect as they posed for a snap in the city.
While Alex wore a smart shirt and jeans, Olivia looked sensational in black bustier and matching 50s-style skirt. Olivia picked up the set from online fashion portal Quiz Clothing and is absolutely delighted with it!
She told her Instagram followers: "Me and my @ab_bowen are off to The Intent premiere. Blacked out this gorgeous two piece, shoes AND choker are from @quizclothinguk YESSS I know! What a find, haven't shopped there in a while but have some great little pieces #OlivesOutfits."
After hooking up during the latest series of Love Island, Alex and Olivia made it all the way to the final. They just lost out on the £50,000 prize money to Nathan and his girlfriend Cara de la Hoyde, but their romance is still going strong!
Earlier today, we revealed how Alex has met Olivia's family and has even been described as a "top fella" by her dad.
The pair first met at the airport after Olivia and Alex flew home from the Love Island villa and they spent this weekend hanging out together.
Meanwhile, Olivia proved just what a fab girlfriend she is by pulling out all the stops for Alex's birthday on Friday.