"Nowadays the toughest thing going to work is leaving my little son behind. Should try glueing him to my arm. Maybe no one will notice," Ranvir posted on Twitter.
The actor, who is married to Konkona Sensharma, became a father in 2011. Their son, named Haroon, turned one March 15.
Ranvir will next be seen in Deepa Mehta's "Winds of Change", a film adaptation of Salman Rushdie's 1981 novel of the same name.