Family
- father Harry Streep Jr:
- mother Mary W Streep:
- brother Harry Streep III: Younger; married to actor Maeve Kinkead
- brother Dana Streep: Younger
- son Henry Gummer: Born c. 1979; father, Donald Gummer
- daughter Mary Willa Gummer: Born Aug. 3, 1983; father, Donald Gummer
- daughter Grace Jane Gummer: Born c. 1986; father, Donald Gummer
- daughter Louisa Jacobson Gummer: Born June 12, 1991; father, Donald Gummer
Companions
- John Cazale: appeared opposite Streep in "Measure for Measure" in 1976; lived together until his death from bone cancer in March 1978
