Several members of the Robinson family were in town for the premiere Thursday night.
Jackie Robinson's son, David Robinson, said his father "saw himself as a common man."
David Robinson said he has seen the film several times and was surprised by how historically accurate it is.
"You'll see the white-only signs (in the movie) ... you won't see that type of exclusion so formally today, but the issues ... of division exist and they are harder to see," he said.
Bob Kendrick, president of the Negro Leagues Baseball Museum, said he hopes "42" inspires people to check out the museum.
"The Negro Leagues Baseball Museum is Kansas City's gift to the rest of the world, so now an opportunity like this gives the world a chance to know about our existence, and we hope to parlay that into greater numbers to come see us," he said.
Harrison Ford, who played Dodgers general manager Branch Rickey, said he felt it was important to share Robinson's story with a new generation.
But what his favorite part of making the film? "Being part of a movie that has an important story to tell, and remind our young people as much as anybody of the strides we've made, how short a period of time ago it was," Ford answered.
Ford graciously signed "Star Wars" memorabilia for the crowd of fans gathered at the premiere. But one set of sisters had something unique for the A-lister to autograph -- a yearbook he'd already signed once in 1960.
Heather Anderson Feagans and Teal Williams explained Ford went to high school in Illinois with their father. They said the star and their dad even carpooled together.
Their father passed away 13 years ago from leukemia. They said he always described Ford as a quiet, good guy.
The sisters showed us their dad's yearbook, in which Ford wrote, "I want to wish you good luck and continued happiness in the future."
They got to ask Ford at the premiere if he remembered their dad, Bill Anderson. Feagans said it took him a minute for the question to sink in, then the star smiled and started reminiscing. Ford said he and their dad had some good times together, Feagans said.
A bonus: Ford re-signed their dad's yearbook, 53 years later.