The movie, directed by Varun's brother Rohit Dhawan, also stars Jacqueline Fernandez.
"BOOM. Introducing Kabir and Junaid. Get ready to #DISHOOM on July 29th 2016. #dhawanandabraham #buddycops," tweeted Varun, 28, alongside the first poster, which shows the two stars on a chase, along with other cops on bikes.
Jacqueline also shared the first look addressing Varun and John as "my boys".
"Introducing my boys Kabir and Junaid!! Get ready to #DISHOOM on July 29th 2016," she tweeted.
Filmaker Karan Johar, who launched Varun in the industry, also tweeted the first look, "John Abraham and Varun Dhawan in the buddy cop spectacle of the year!! #DISHOOM releasing 29th July...2016.