Krishna Kumar "Kay Kay" Menon is an Indian actor who works predominantly in Hindi cinema, and few in Gujarati, Tamil, Marathi and Telugu. He is best known for his roles in films such as Black Friday (2004), Sarkar (2005), Shaurya (2008), Gulaal (2009), Haider (2014), Baby (2015). He has starred in web series such as Special Ops, Farzi and The Railway Men.

Black Friday is a 2004 Indian Hindi-language crime film written and directed by Anurag Kashyap. Based on Black Friday: The True Story of the Bombay Bomb Blasts, a book by Hussain Zaidi about the 1993 Bombay bombings, it chronicles the events that led to the blasts and the subsequent police investigation. Produced by Arindam Mitra of Mid-Day, the film stars Pawan Malhotra, Kay Kay Menon, Aditya Srivastava, Kishor Kadam and Zakir Hussain.