Rentschler grew up in Birmingham and graduated from Shades Valley High School in 2002. She performed in local theater productions and competitions while completing an undergraduate degree at UAB. She went on to earn a master's from the University of Central Florida followed by a residency with the Orlando Shakespeare Theater.
Rentschler relocated to New York, and then to Los Angeles to pursue acting roles, and has also written, produced and directed a few short films. She also joined Mensa International.
Rentschler married Alex Klein in 2016.
- Cook, Sara (March 2019) "Birmingham native finds success as Hollywood actress." Birmingham magazine
- Britt Rentschler at IMDB.com