The actor, who turns 50 on March 14, is currently preparing for the Nitesh Tiwari-directed film, which will go on floors in the next coming months.
Besides putting on 22 kilos, Aamir has turned vegetarian and also learning Haryanvi for the film.
"You can see that the preparation is on for 'Dangal'. The film is going on floor in next few months but we have not blocked the dates. The casting is still on. I am learning wrestling and learning Haryanvi," Aamir said during the DVD launch of his last film "PK" here last evening.
"Dangal" is reportedly based on the life of wrestler Mahavir Phogat and his daughters - Geeta, Babita and Sangita. Mahavir along with Geeta and Babita also made an appearance on one of the episodes of Aamir's issue-based TV show 'Satyamev Jayate'.
