How did Rana and Arya join Ajith?

Though Ajith holds the center stage in Arrambam, the presence of Nayanthara, Taapsee and the two hunks Arya and Rana, can't be discounted. Vishnuvardhan maintains an excellent rapport with both Arya and Rana and recounted how the two came on board this mega project."When I approached Arya, he just a featurednews