Drishyam (2013)
Not Mohanlal, but Mammootty was origianlly offered the leading role in Jeethu Joseph's blockbuster. Mammootty rejected the film as he was, busy with other project
Memories (2013)
Before Prithviraj Sukumaran, Mohanlal was offered the film, but the latter couldn't do the film due to date clash
Ekalavyan (1993)
After hearing the script, Mammootty told Shaji Kailas that he is not impressed with the dialogue. Thus Shaji Kailas decided to' make the movie with Suresh gopi
Rajavinte Makan (1986)
Before Mohanlal, Mammootty was approached for the film, but he couldn't do the film due to unknown reasons
Run Baby Run (2012)
Another Mohanlal-starrer that was actually offered to Mammootty first
Iruvar (1997)
Not Prakash Raj, but Mammootty was first considered for the film, but he rejected due to unknown reasons
Alaipayuthey (2000)
Before Arvind Swamy, Mammootty and Mohanlal were approached for the same role, but they both rejected the film