WATCH: Steamy first full movie trailer for 'Fifty Shades of Grey' drops, includes glimpse inside 'red room'

SEATTLE --  It may be the most anticipated book-to-movie in years.

The first full length trailer for Fifty Shades of Grey dropped Thursday morning on YouTube and it was trending on Facebook and Twitter within minutes.

In the trailer we get our first real look at first college student Anastasia Steele (Dakota Johnson) as well as billionaire Christian Grey (Jamie Dornan).

But of course what EVERYONE really wants to see is inside the 'red room of pain.'

Watch the full trailer to the very end to get a glimpse (or two).