"Always seem to have fun on couches together," she wrote of herself and Anushka:
Of the 1800 comments the post received was this revealing one from Anushka Sharma: "Haha, true. There is more in store for you guys soon. Hint: Koffee."
Both women have appeared on previous seasons of the show. Katrina Kaif, 33, shared the Koffee couch with Lara Dutta on Season 2 in 2007. Anushka Sharma, 28, has been on Koffee With Karan twice - on Season 3 in 2010 with Ranveer Singh and last season with Anurag Kashyap.
It has not been revealed when the Katrina-Anushka episode will be aired.
Koffee With Karan 5 was inaugurated some weeks ago by Shah Rukh Khan, who starred in Jab Tak Hai Jaan with Katrina Kaif and Anushka Sharma. He appeared with his Dear Zindagi co-star Alia Bhatt. This Sunday's episode will feature Aamir Khan and his Dangal co-stars Sanya Malhotra and Fatima Sana Sheikh. Other guests this season have included Twinkle Khanna and Akshay Kumar, Ranveer Singh and Ranbir Kapoor, and Salman Khaan with his brothers Arbaaz and Sohail in wat was the show's 100th episode. Shahid and Mira Kapoor have also recorded their show.
Both Katrina Kaif and Anushka Sharma had two films out this year. Katrina starred in Fitoor and Baar Baar Dekho, Anushka in the infinitely better received Sultan and Ae Dil Hai Mushkil. Katrina is now filming Jagga Jasoos with Ranbir Kapoor, Anushka is making an Imtiaz Ali-directed movie with Shah Rukh Khan.