This will be the fourth biographical figure played by Chadwick Boseman. He has also starred as James Brown in Get on Up (2014), Jackie Robinson in 42 (2013), and Floyd Little in The Express (2008).

Both Chadwick Boseman and Thurgood Marshall went to Howard University.

The synagogue that Sam Friedman is shown attending with his family is called Temple Rodeph Shalom. "Rodeph shalom" (sometimes spelled "rodef shalom") is Hebrew and means "pursuer of peace." The Talmud applies this label to a person who stands for justice, as Friedman's character does in this movie.

From 2005 to 2008 director Reginald Hudlin wrote the Marvel comic book Black Panther. Chadwick Boseman played Black Panther in Captain America: Civil War (2016) and set to play the character in several more Marvel Studios films.

Several scenes take place outside the courthouse. They were shot on the steps of Buffalo, New York, City Hall.

Chadwick Boseman and Sterling K. Brown also starred together in Black Panther (2018).

Sterling K. Brown and Keesha Sharp previously worked together in the FX series American Crime Story (2016): The People v. OJ Simpson.

Josh Gad and Dan Stevens previously collaborated in Beauty and the Beast (2017).

The film features art by American watercolorist Martha Burchfield Richter (1924-1977). She is the daughter of world-renowned watercolorist Charles E. Burchfield.

Jeffrey DeMunn and James Cromwell both had major roles in The Green Mile (1999).

Some of the items in the law office were Roycroft antiques. Roycroft was a reformist community of craft workers and artists which formed part of the Arts and Crafts movement in the United States. Elbert Hubbard founded the community in 1895, in the village of East Aurora, New York, near Buffalo. Participants were known as Roycrofters. The work and philosophy of the group, often referred to as the Roycroft movement, had a strong influence on the development of American architecture and design in the early 20th century.

The film was shot in Buffalo, NY. Mj Myers, Greg Hinaman, Josie DiVincenzo, Stan Klimecko, and Steve Abbott are originally from Buffalo.

Sophia Bush and Marina Squerciati both star in Chicago P.D. (2014) and the 'One Chicago' franchise.

The train station which Marshall arrives at is a real historical train station in Buffalo, NY, known as "the central terminal." The building its self is a wreck and the windows seen in the film where digital restored, but it is funny to think about the fact the actors are walking around in what is basically a modern ancient ruin.

Jeffrey DeMunn also hails from Buffalo, NY.

In the movie, Thurgood Marshall and his wife, Vivian "Buster" Burey Marshall, struggle to have a baby. In real life, Thurgood and Buster never had children. Buster died of cancer in February 1955, only a few months after Thurgood's landmark Supreme Court victory in Brown v. Board of Education. In December 1955, Thurgood married Cecilia "Cissy" Suyat, a Filipina immigrant who was the secretary to the director of the NAACP's branch offices. They had two sons, Thurgood Marshall Jr. and John W. Marshall.

The final scene of the current theatrical release of the film features a cameo from Tracy Martin and Sybrina Fulton, the parents of Trayvon Martin. Also famed Civil Rights attorney, Benjamin Crump is the lawyer who meets Marshall along side the parents. Marshall died two years before Martin's birth.