"Full day of auditions for Paani in L.A. Range of talent in young actresses is quite amazing and even the biggest stars are not shy of auditioning," Kapur posted on Twitter on Friday.
To be made under the Yash Raj Films banner, the film stars Sushant Singh Rajput and is based on a future world where wars over water have broken out. The film's cast will have both Indian and western actors.
Paani goes on the floors in mid-2014.