"Ranbir Kapoor has given the most outstanding performance... he deserves a running ovation! It will be an honour to work with him," he further tweeted.
Johar also heaped praises on Priyanka Chopra for her portrayal of an autistic girl.
"Priyanka Chopra is just brilliant as Jhilmil. Superbly nuanced and pitch perfect. Her portrayal lingers long after the film.. Well done Ileana D'Cruz !!! Superb debut... and Kudos to all at UTV for this masterpiece that defines the barometer of modern cinema," he added.