Reeves was born in Rockville Centre, New York, and raised in Los Angeles. He began making movies at eight years old, directing friends with a wind-up camera. Reeves met J.J. Abrams when both were 13 years old, and both were having their short films aired on a cable access channel. Reeves and Abrams became friends and eventually co-created the TV series Felicity.
Reeves attended the University of Southern California. There, he produced an award-winning student film titled "Mr. Petrified Forest", which helped him acquire an agent, and also co-wrote a script that eventually became Under Siege 2: Dark Territory. After graduating, he co-wrote The Pallbearer, which also became his professional directorial debut.
In addition to co-creating Felicity and directing a handful of said series' episodes, including the pilot and several season finales, Reeves has helmed the occasional episode of other TV series, including Homicide: Life on the Street and Relativity.
- Future Shock (1993), director, "Mr. Petrified Forest" segment
- Under Siege 2: Dark Territory (1995), writer
- The Pallbearer (1996), director & writer
- The Yards (2000), writer
- 28 Weeks Later (2007), actor
- Cloverfield (2008), director
- The Invisible Woman (2009), director