VJ-turned-actor Ayushmann Khurrana, who plays the lead role in John Abraham's debut production venture "Vicky Donor", says the latter is one of the most selfless person he has ever come across.

"John's association with this film is a cherry on the cake. He has also done a promotional number for the film. He is a very selfless guy, he could have cast himself in the movie but he believes that justice should be done to the character," Ayushmann told.

The film deals with the issue of sperm donation. It also features veteran actor Annu Kapoor and actress Yami Gautam.

Ayushmann is in favour of star associations with films on socially relevant causes, but there's a catch, he says.

"I think more than the star, content is the king. If the script is not strong then even star associations don't matter," he added.

"Vicky Donor" will hit the silver screen April 20.