Balle balle! Aamir at Greenathon 4

Ayushmann Khurrana's Papa Kehte Hain went down a treat with Aamir Khan who joined the younger actor to dance to Rang De Basanti.

Two good – Aamir and Ayushmann.

Ayushmann Khurrana has moves like Aamir. He paid tribute to his favourite actor by dancing to the tune of Papa Kehte Hain and other Aamir hits.

Coming up: Greenathon 4: Here comes Aamir

Here's Aamir Khan on NDTV-Toyota Greenathon 4.

The actor, who is riding high on the success of his new television show, Satyamev Jayate, sponsored 5 villages.

NDTV's Dr Prannoy Roy joined Vikram Chandra, Priyanka Chopra and Cyrus Broacha on stage.

NDTV's Dr Prannoy Roy greets Aamir Khan.

Aamir being greeted by Priyanka Chopra on stage.

Aamir Khan on stage with NDTV's Dr Prannoy Roy, Vikram Chandra, Priyanka Chopra and Cyrus Broacha.

Director, actor, singer and producer Farhan Akhtar also joined the green cause. Aamir meets his Dil Chahta Hai director.

Farhan with Aamir, Dr Roy, Vikram.