Michael Guerin is a fictional character created by Melinda Metz for the young adults book series Roswell High and adapted by Jason Katims for the American science fiction television series Roswell (1998–2002). He was portrayed by actor Brendan Fehr in the television series. In the CW reboot, Roswell, New Mexico, he is played by Michael Vlamis.

Roswell is an American science fiction television series that imagines the rumoured Roswell UFO exists and its aliens are hiding in plain sight as a trio of high school-aged teenagers. Developed, produced, and co-written by Jason Katims, the series debuted on October 6, 1999 on the WB, and later shifted to UPN for the third season. The final episode aired on May 14, 2002. Sixty-one episodes in total were broadcast over the shows three seasons. In the United Kingdom, the show aired as both Roswell High and Roswell.