Lindsay Lohan revealed her darker side recently during a photo shoot for her upcoming porn star biopic "Inferno" -- and she did it all wearing nothing but your grandma's underwear.
The photos were taken by well-known photog Tyler Shields ... but they're for promotional purposes only. The film -- in which Lindsay plays porn legend Linda Lovelace -- hasn't even been shot yet.
I Look Like a
'70s Porn Star
7/31/2010 7:00 AM PDT BY TMZ STAFF
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