Aamir Khan as PK

Anushka Sharma as Jagat 'Jaggu' Janani Sahni

Saurabh Shukla as Tapasvi Maharaj

Boman Irani as Cherry Bajwa

Sushant Singh Rajput as Sarfraz Yousuf

Sanjay Dutt as Bhairao Singh

Parikshat Sahni as Jayprakash Sahni

Reema Debnath as Phuljhadiya

Rukhsar Rehman as Pakistan Embassy Receptionist

Sachin Parikh as Tapasviji's Manager

Brijendra Kala as Vendor at the Temple

Sai Gundewar as Ticket Seller

Karim Hajee as Christian Holy Man

Maanvi Gagroo as Mitu

Anil Charanjeett as Actor Dressed as Shiva

Amardeep Jha as Jaggu's Mother

Plabita Borthakur as Jaggu's Sister

Rajiv Gupta as New Delhi Sub-Inspector

Shaji Choudhary as Tapasvi's Bodyguard

Ram Sethi as Old Man (cameo)

Rohitashv Gour as Pandey Ji (cameo)

Ranbir Kapoor as Alien Scientist (cameo)