The Game of Thrones star, 22, looked stunning on a leggy display in a pair of leather thigh-high boots which she finished up with chunky gold soles.
Additionally, the actress revealed her sharpen frame in a shimmering lavender mini-skirt, pairing with a black silk t-shirt decorated with gold sequins.
Knotting at her waist, the X-Men star teased a glimpse of her well-toned abs. The blond beauty's locks were styled sleek and straight, parted on the side.
The Jonas Brothers singer, 29, on the other hand, looked dapper in a silver fitted suit which he wore over a black polo neck. He also rocked a pair of monochrome trainers.
The couple looked adorable while strolling along hand-in-hand and gazed into each other's eyes.
As previously reported, in the early September, Joe and Sophie packed on some PDA: they were spotted kissing at Arthur Ashe Stadium at the USTA Billie Jean King National Tennis Center in New York.
The couple, who started dating in 2016, became engaged last October. They announced their engagement with sharing matching posts which shows off Sophie's pear-shaped band.
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