United Kingdom, Aug. 20 -- Anthony Michael Hall was "there for" Robert Downey Jr. and used to visit him in prison.

The 58-year-old actor has reflected on his friendship with the Marvel star, who he worked with on Weird Science and Saturday Night Live, and opened up on how deep their bond runs.

He told Danielle Fishel's Teen Beat podcast: "I've been there for him.

"Years ago when he was in trouble with the law, I spent a little time in the clink - so to speak - I went to visit him. We just have a long history together."

Downey Jr, 61, has been candid about his previous struggles with drug and alcohol addiction, which led to a 1996 arrest on drug and weapon charges.

He was sentenced to three years in prison in 1999 over parole violatio...