Jemima's father has English and Scottish ancestry. Jemima's maternal grandfather, Jack Dellal, was of Iraqi Jewish descent. Jemima's maternal grandmother, Zehava Helmer, was an Israeli of Ashkenazi Jewish descent.
Met husband Michael in a doctor's office when she had bronchitis.
Is a visual artist, which is her top priority, and feels that acting is secondary.
Gave birth to her 1st child at age 25, a daughter Rafella Israel Mosberg in October 2010. Child's father is her husband, Michael Mosberg.
Sister of actress Lola Kirke.