Robert Downey Jr. Talks Drug Use, Jail

Continuing on his massive promotional tour for “Iron Man 2,” Robert Downey Jr. was spotted paying a visit to “The Late Show with David Letterman” yesterday (April 28).

Joined by his lovely wife Susan, the “Sherlock Holmes” hunk looked dapper in a fedora paired with a black leather jacket, grey Henley top, and jeans.

In a recent interview, Robert talked about his struggles with substance abuse and his time in prison as a result.

"Smoking dope and smoking coke, you are rendered defenseless. The only way out of that hopeless state is intervention. All those years of snorting coke, and then I accidentally get involved in heroin after smoking crack for the first time. It finally tied my shoelaces together."

"When the [prison] door clicks shut, then you are safe. There is nothing aside from a rogue correctional officer that can do you harm if you have the right cellie. You are actually in the safest place on Earth. Safe from the intruders."

Enjoy the pictures of Robert Downey Jr at the Late Show with David Letterman (April 28).