New Delhi, Oct. 30 -- Robert Downey Jr has come a long way from the actor who was paid a reported $500,000 for the first Iron Man film in 2008. Nearly two decades later, he is among Hollywood's highest-paid stars, with an estimated net worth of $300 million.

His return to the Marvel Cinematic Universe as Doctor Doom in Avengers: Doomsday is expected to add another major payday to a fortune built through films, investments, property and business ventures.

The $300 million figure, reported by Celebrity Net Worth, is an estimate rather than a confirmed statement of his assets. His actual wealth is difficult to calculate because his film contracts, private business interests, investments and property holdings are not fully disclosed.

Playi...