The engaged couple looked blissfully happy while attending a cocktail reception for Jennifer's new movie Cake at the city's West Bar on Monday night (8 September).
Looking as gorgeous as always, the pair weren't shy about snuggling up for the cameras and sharing a few lingering looks of love!
Jennifer walked the red carpet solo at the movie's screening at the Toronto International Film Festival but met up with hunky Justin at the after-party.
The former Friends star received a standing ovation once the movie had ended thanks to her powerful role as a woman suffering from depression and addiction.
Respected trade newspaper Variety called it a "breakthrough performance" for Jen, while People magazine hinted the role could win Jen a fair few awards.
Jen plays a woman suffering from chronic pain who becomes fascinated by the suicide of a woman in her support group. She forms a bond with the woman's husband, played by actor Sam Worthington.
In the film, the gorgeous actress wears absolutely NO make-up: a far cry from her glamorous appearance at the movie's premiere last night.
Watch Jen in the Cake trailer below:
Jennifer told E! News that she'd actually popped into a chemist one night after filming, dressed in her character's dowdy clothing and without a scrap of make-up.
"Nobody recognised me! It was pretty awesome. Actually, people felt sorry for me more than anything. "It's one the most liberating things. It was incredible."
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!