Many a times a supporting role sho much overshadowe the lead that people forget who the lead actor of the film is and the Suporting Actor becomes the identity of the film.
Sunny Deol in Damini barely had a 15–20 minute role in the film but he owned the film like anything winning the Filmfare and National award for Best Suporting Actor and totally overshadowing the lead actor of the film Rishi Kapoor
Similarly SRK only had a supporting role in Deewana who appears in the second half of the film and the film was sold as Rishi Kapoor film. Today the film is remembered for SRK and music of the film
Rajkumar Rao had a supporting role in Bareilly ki Barfi but he totally stole the show and Ayushman Khurana was sidelined despite being the lead actor.
In 1996 Agni Sakshi was one of the biggest hits and the only hit version of Sleeping with the enemy (the other two Yarana and Daraar failed). The difference between the three films was Nana Patekar. Jackie Shroff was totally misfit in his role but as soon as Nana enters the films he put life into the film and elevated the film to another leval. He won a National award for Best Suporting Actor despite being a negative role and was nominated for Best Actor totally outclassing Jackie Shroff.
Manoj Bajpayee gained stardom, a National award and a Filmfare for Satya even though the title character Satya was played by DK Chakrvarty, whom many people don't even remember such was the impact of Bhikhu Mhatre.