"I am feeling bad as I couldn't run this year, but I will run next year for sure," said Katrina.
Actors Rahul Bose, R. Madhavan and Gulshan Grover also attended the marathon.
"Hats off to Mumbaikers, I salute them. My knees are paining so much. I don't understand how senior citizens run so much," R.Madhavan told reporters.
In its 13th year, over 40,000 runners took to the streets of Mumbai on Sunday.