Downey Jr made movies while high on crack cocaine, heroin

London: Hollywood star Robert Downey Jnr has confessed to making movies while high on crack cocaine and heroin.

He said: "It used to be that you could throw me out of the back of a party van on to the set, give me a tuna melt, and I could function."

In a mag interview, the Iron Man 2 star also explained how he was arrested in 1996 after a cocaine binge lasting at least two days. He was later bailed by his dealer`s boyfriend in Malibu, California, reports The Sun.

The 45-year-old said he then went home and took drugs he retrieved from a dustbin.