Chaos Theory is a 2008 American comedy drama film starring Ryan Reynolds, Emily Mortimer, and Stuart Townsend.

The film was directed by Marcos Siega, written by Daniel Taplitz and Kathy Gori, and was shot in Coquitlam and Squamish, British Columbia.

Obsessively organized efficiency expert Frank Allen tells his future son-in-law Ed how his life had unraveled in unexpected ways when he was forced to learn to forgive his wife's transgression, in response to his cold feet.

A professional lecturer on time management, Frank perfectly maximizes his efficiency through scheduling and planning his life down to the minute.

Chatting with Paula from his lecture, she requests to use his hotel room bathroom supposedly to avoid the public restroom, but then hits on him.

Undergoing a paternity test to prove the baby is not his, Framk is told he has Klinefelter's syndrome, so sterile from birth.

After advocating for living on whim at his own time management lecture, Frank decides to base his life decisions on shuffling three index cards with written options and randomly choosing one.

The site's critical consensus reads: "Ryan Reynolds and Emily Mortimer do what they can, but ultimately Chaos Theory is an overly conventional dramedy.

[3] Dennis Harvey of Variety wrote: "The lead performers, the brighter fillips in Daniel Taplitz’s screenplay and Marcos Siega’s ("Pretty Persuasion") assured direction make this a pleasing item overall.

"[4] Michael Rechtshaffen of The Hollywood Reporter wrote: "The picture continuously shuffles moods like tunes on an iPod without ever making any lasting commitments.