Her parents dated for almost a year before getting engaged in 2013. They were married the following year. She was born in 2015 via surrogate.
In honor of her second birthday, her father, Berkus, posted an Instagram video captioned "Dear Poppy, today you are two. Your daddy and I remember when you were just an idea."
Her grandparents are Mike Berkus and Nancy Levin through her father Nate. Her parents' welcomed a son named Oskar in 2018.
Oprah Winfrey was an executive producer on her father's series The Nate Berkus Show.