Vijay Deverakonda and Samantha Ruth Prabhu engaged in a fun banter on social media to promote their upcoming film 'Kushi'. Vijay shared a video on Instagram, where he told Samantha a knock-knock joke in the middle of the night. Fans showered the post with likes and comments. Directed by Shiva Nirvana, 'Kushi' also stars Sachin Khedekar, Rahul Ramakrishna, Murali Sharma, and Vennela Kishore.