Her parents are lawyers. Her father, Richard C. Daddario, was a federal prosecutor in New York City for 13 years before being named Head of the NYC Police Department's Anti-terrorism Bureau (in 2010). Her mother is Christina Titus.].
Started acting in 2002 and has also worked in music departments. It happened in an episode of The Last Man on Earth (2015), but her very first experience was in Lie (2006), starring Alan Miller, featuring Miranda Cosgrove.
Her father is 75% Italian and 25% Irish, while her mother has Hungarian, Slovak, German, and English ancestry.
When she was 16 she got transferred from Brearley School to the Professional Children's School (in New York), so she could better focus on her acting skills.
Attended Marymount Manhattan College in NYC.
She did voiceover work on "I Spy School Days" (a book of picture riddles).