Doctor is a 2021 Indian Tamil-language action comedy film written and directed by Nelson. The film stars Sivakarthikeyan who also produced it under his banner Sivakarthikeyan Productions, whereas KJR Studios served as the co-producer and distributor. The film also stars Priyanka Arul Mohan and Vinay Rai while Yogi Babu, Milind Soman, Redin Kingsley, Archana Chandhoke and Deepa Shankar appear in supporting roles.