Not everyone remains close with their college roommate.

Sometimes opposites attract, after all.

Our families showed up for each other, Reeves son Will Reeve tellsEntertainment Weekly.

Christopher Reeve and Robin Williams pose backstage at the People’s Choice Awards, March 1979

Christopher Reeve and Robin Williams backstage at the People’s Choice Awards in March 1979.Fotos International/Frank Edwards/Getty

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Super/Manshows how shut the Williams family was with the Reeves in the years after the accident.

We knew so much more about this relationship from talking to the families.

Im sharing it with you guys because I trust you, and I want to do justice to Christopher.

That felt extra special because we also had Robin Williams legacy to discuss in our film.

Reeve and Williams seem like an odd pair at first glance.

You dont always expect the jock and class clown to be close friends.

But perhaps it was their differences that made them each so essential to each other.

I think in a sense they completed each other, Ettedgui says.

Chris was quite a rigorous person, and he needed Robin’s sense of anarchy and fun.

Meanwhile, Chris was a very dependable and loyal person, and Robin really needed that in his life.

So I think they both gave something to the other.

Whats remarkable about their friendship is just how good they were to each other.

Their fame had nothing to do with it.

The public might be attracted to Oh wow, Superman and Popeye hanging out!

But these two icons were just really good friends.

They liked each other.

Their relationship was grounded, and it was rooted in love.

Super/Man: The Christopher Reeve Storyhits theaters on Oct. 11.

Watch the exclusive clip above.