- Great nephew of Joseph L. Mankiewicz.
- Son of Frank Mankiewicz who was the first president of National Public Radio and press secretary to Robert F. Kennedy.
- Was married by Judge Joseph Wapner of the classic TV show, The People's Court (1981). Wapner and Ben's parents, Frank Mankiewicz and Hollie Jolley, met and became friends while attending UCLA.
- Grandson of Herman J. Mankiewicz.
- Brother of NBC news reporter Josh Mankiewicz.
- Casablanca (1942) and Out of Sight (1998) are two of his favorite films of all time.
- Ben and his wife love animals and adopted a dog they named Rookie (the second dog Ben named in honor of his favorite baseball player Mitchell Otis Page) that had been living on the streets for nearly a year. Rookie became a regular feature of the "Young Turks" radio show and still accompanies Ben to the studio when he guest hosts the show.
- Nephew of Don Mankiewicz and the late novelist Johanna Mankiewicz Davis.
- He is a huge fan of Bruce Springsteen. He travels often to see Bruce and the E Street Band, visiting many cities to see multiple shows on each tour. He grew up in Washington, DC and has fond memories of jingles and songs written by fellow DC native and E Street Band member Nils Lofgren, especially "Bullets Fever".
- Believes Red Dawn (1984) and College (2008) are two of the worst films ever made.
- Huge baseball fan; devotee of the former Oakland A's star Mitchell Page.
- First cousin once removed of Alexandra, Christopher Mankiewicz and Tom Mankiewicz.
- First cousin of Timothy, Jesse, Antonia and Nick Davis (Johanna's children. Also the cousin of John Mankiewicz (Don's son).
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