"I was really touched by everything Irrfan did for me," Farahani said in a statement.
"Song of Scorpions" is a directorial by Anup Singh of "Qissa" fame.
The film brought Farahani and Geneva-based Singh to India in early August.
Even though Irrfan had an erratic schedule, he ensured that the guests have a good time and invited them over for dinner discussing anything and everything be it cinema or food or simply the details of their upcoming film, said a source.
Irrfan is currently filming an action-drama film "Jazbaa", directed by Sanjay Gupta. It is also actress Aishwarya Rai Bachchan's come-back movie and features Shabana Azmi in a supporting role.