Alonso was a regular cast member in the NBC post-apocalyptic series Revolution from 2012 to 2013, and the medical drama The Night Shift in 2014.

She has stated that she "grew up in a pretty much all woman household in NYC", but added that her father, grandfather and uncles had "strong influences" in her life as well.

She loves animals and supports PETA,[3] posing in a 2013 advertising campaign that asked consumers to wear synthetic leather.

Alonso later starred in the first season of another NBC series The Night Shift as Dr. Landry de la Cruz, which aired on the summer of 2014.

In 2019, she joined the cast of The CW prime time soap opera Dynasty replacing Ana Brenda Contreras in the role of Cristal Jennings.