The couple, who have been engaged since 2012, cuddled up in co-ordinating outfits while attending a cocktail reception for Jennifer’s new movie Cake at the city's West Bar.
Jennifer worked as executive producer for the film. She also stars as the troubled lead character – a woman battling chronic pain and addictions to painkillers and alcohol. The Hollywood beauty has said the part was emotionally and physically tough, but "beyond a dream role".
At the project's Canadian launch, Jen looked stunning in a black tank top and pleated Emanuel Ungaro skirt. She completed the outfit with black Louboutin heels and her beautiful eight-carat diamond engagement ring.
Meanwhile Justin looked dapper in a sharp black suit, and evidently couldn’t keep his eyes of his wife-to-be as they exchanged a loving gaze in front of the cameras.
While they have not yet revealed their wedding date, Jennifer and Justin are said to be planning to marry "right by the ocean".
Jennifer's former wedding planner Kevin Lee revealed to RadarOnline that the couple will have a low-key ceremony, saying "It will be a beach meets California modern-chic sort of thing".
The actress has kept quiet about the details of her upcoming nuptials, but recently opened up about the pressures she feels to get married and have children.
Speaking to Today, she said: "It is such an issue of, like, 'Are you married yet? Are you going to have your babies yet?' It's just constant. It's like, I don't know!"
"I don’t have this sort of checklist of things that have to be done, and if they're not checked, then I’ve failed some part of my feminism or my value as a woman because I haven't birthed a child".