Jasmine stunned in a glamorous long black gown, which showed off her small baby bump.
While Karl opted for a traditional black tuxedo alongside a white buttoned shirt, black bow tie and matching coloured shoes.
The couple's outing comes after Jasmine's "friend" recently confirmed the couple are expecting a child and are "over the moon" to be starting a family.
Last week, the couple set the rumour mill on fire after Jasmine was spotted in New York City at what appeared to be her own secret baby shower.
Jas attended a dinner with friends in New York, where she was tagged in a friend's Instagram post cradling her sweet baby bump.
Adding fuel to the fire, the friend captioned the candid shot with a baby emoji next to the bump.
According to The Daily Telegraph in April, it was revealed Karl, 45, had "undergone a second vasectomy reversal surgery" and is trying for a baby with Jasmine.
Karl is already dad to three children - Jackson, 20, Ava, 14, and River, 12, who he shares with his previous wife of 21 years, Cassandra Thorburn.