Mallika Sherawat has penned an appreciation note for her 'mentor' and 'role model'-- filmmaker Mahesh Bhatt, saying his words of encouragement during moments of doubt have been a source of strength.

Mallika, who played the lead in producer Mahesh Bhatt's 2004 thriller movie 'Murder', co-starring Emraan Hashmi, took to Instagram on Tuesday and penned a beautiful note for the director.