Chennai

In the Instagram clip, Ishaan and Siddhant are first seen exercising seriously and then they slowly shift to having fun with their workout bands and equipment.

"@katrinakaif Come workout with the boyzz! #Quick2Mins #SiddShaan #PhoneBhoot @phonebhoot @excelmovies," Siddhant wrote as the caption.

Katrina took to the comment section and called the video a "creative genius".

"@ishaankhatterthis is creative genius," she commented.

She added: "Awesome. U guys have done more shooting then me today."

Phone Bhoot is directed by Gurmmeet Singh, and produced by Farhan Akhtar and Ritesh Sidhwani. The film is written by Ravi Shankaran and Jasvinder Singh Bath.