Sriram Raghavan, known for films such as 'Badlapur' and 'Andhadhun', is all set for the release of his next film 'Merry Christmas' starring Katrina Kaif and Vijay Sethupathi. The filmmaker had earlier mentioned how he had Saif Ali Khan in his mind for the role which is now being played by Vijay Sethupathi.?