'Her' Trailer: Joaquin Phoenix Falls in Love With Operating System (Video)

The Spike Jonze-directed drama hits theaters Nov. 20.

Joaquin Phoenix finds himself getting close with Samantha, a Siri-like personal assistant, in the trailer for Spike Jonze's Her

Phoenix plays Theodore, an introverted man getting over a relationship who decides to install the "world's first artificially intelligent operating system" into his computer.  

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Samantha, voiced by Scarlett Johansson, not only checks his emails and organizes his life but engages Theodore playfully in banter and late night conversations. 

As Theodore keeps conversing with Samantha, things get thornier. "What's it like to be alive in that room right now?" the operating system asks. He eventually professes his love for "her."
The film, written and directed by Jonze (Where the Wild Things Are, Adaptation), is set for release Nov. 20. The trailer is set to the Yeah Yeah Yeah's "Skeletons."