Host Karan Johar took to his Instagram account to make the announcement with a picture of the siblings looking their stylish best as they strike a pose for the camera. While Janhvi can be seen wearing a cold-shoulder dress, Arjun looked dapper in a black tuxedo.
"Had koffee with the siblings today! Was so much fun! Emotional and hysterical in equal measure! #KoffeeWithKaran @arjunk26 #janhvi" read the caption.
KJo also shared behind the scenes shots on his Instagram stories.
This will be Jahnvi's first appearance on the show unlike Arjun, who has appeared on previous seasons.
On the work front, Arjun is all set for his upcoming romantic-comedy 'Namaste England' opposite Parineeti Chopra. The movie has been creating immense buzz owing to the crackling chemistry between the leading duo.
Directed by Vipul Amrutlal Shah, the flick will hit the big screens on October 19, this year.
Janhvi, on the other hand, was last seen in 'Dhadak' which marked her debut in the Bollywood industry. An official adaptation of 'Sairat', 'Dhadak' also starred Ishaan Khatter in the lead role.