New Delhi, July 12 (IANS) Bollywood actor Saif Ali Khan, who is playing a Sikh in some parts of his debut production 'Love Aaj Kal', says essaying the character meant a lot of responsibility for him. 'You have to work with great responsibility while playing certain characters so that you don't end up hurting others' sentiments. I have played the role of a Sikh gentleman in this film with sensitivity. A lot of work went behind it in order to make the character authentic,' Saif told reporters. 'We took care of the costumes, the look, mannerisms, dialect and a lot of other things like I was told not to smoke while wearing the turban while we were shooting for the film in Patiala,' he added. 'Love Aaj Kal', directed by Imtiaz Ali of 'Jab We Met' fame, also stars Deepika Padukone and is set to release July 31.