Answer
The answer is "Vijay". Anupam Kher won his first Filmfare Award for Best Supporting Actor for his exceptional portrayal of a police officer in the 1988 film "Vijay", starring Rajesh Khanna and Hema Malini. The film, directed by Yash Chopra, is a romantic drama that explores the struggles of a man caught between two women. Kher's performance was widely acclaimed and marked a significant milestone in his illustrious acting career.