Raver was born and raised in New York City by her mother, Tina Raver, and her stepfather, Chris Meltesen. She has a sister, Cybele Raver, as well as three half sisters, Nadja Raver, Grace Raver, Aimée Raver, and two half brothers, Jacob Raver, and William Raver. She attended Northfield Mount Hermon School, a boarding school in Northfield, Massachusetts where actor Bryan Callen was a classmate. Raver attended Boston University, where she received a Bachelor of Fine Arts degree in drama. Raver continues to study theater in New York with teacher and mentor Wynn Handman. She is fluent in French and German, a language that she learned as a child from her German-born mother.