Darby got her start in acting by visiting "Darby World" as a toddler. She would get lost in fantasy and play, leading her sister Ruthie to always comment, "She's in Darby World again!" Darby's mother Lacy earned a BFA in college, has had a love of acting her whole life and is active in the industry today. Lacy noticed Darby's imagination and self-confidence early and asked her agent to begin submitting her for roles. She booked her first job (Drop Dead Diva) at the age of 6. Then Blue the next year. Darby tested for a feature film, but did not book the role. She comments that she learned so much from not booking that she was able to apply going forward. It helped her book her biggest role as Chloe Mackenzie on HBO's Big Little Lies. "Learning from disappointment and keeping your courage is a necessary trait in the acting field," Darby said. "The great thing is, there's always another opportunity, which is all you can hope for." She has been fortunate enough to work on amazing projects with amazing actors and directors. Yet her favorite role is still a quiet Saturday morning in her den surrounded by her dogs and stuffed animals, exploring the vast expanses of "Darby World".