Morrow grew up in Westlake Village, California, and became a member of The Groundlings, as was Mindy Sterling and Mary Scheer, others iCarly cast members.
She has two different color eyes. Her left eye is blue and her right eye is brown, due to heterochromia iridum.
She has to change her voice to be Nora. For the iCarly episodes iStill Psycho, she had to wear a pair of earplugs in her nose to sound congested. It is likely that she used them again in Sam & Cat.
She has been married to actor Jeremy Rowley since 2016, who was also an iCarly cast member as Lewbert. Their first child, a son, was born in 2017.
She is also currently a teacher at The Groundlings Theatre & School in Los Angeles, California.