Her parents became engaged in 2010, though they didn't marry until 2014.
Shortly following her birth, her mother released her own maternity clothing line. Simpson also released the perfume Vintage Bloom, which was inspired by motherhood.
Her younger brother, Ace Knute Johnson, was born in June 2013.
Her aunt is singer and actress Ashlee Simpson. Ashlee became known for her role on 7th Heaven and for playing Roxie Hart in Chicago on Broadway.