Frank Adler (Chris Evans) is a single man raising a child prodigy - his spirited young niece Mary (Mckenna Grace) in a coastal town in Florida. Frank's plans for a normal school life for Mary are foiled when the seven-year-old's mathematical abilities come to the attention of Frank's formidable mother Evelyn (Lindsay Duncan) whose plans for her granddaughter threaten to separate Frank and Mary. Octavia Spencer plays Roberta, Frank and Mary's landlady and best friend. Jenny Slate is Mary's teacher, Bonnie, a young woman whose concern for her student develops into a connection with her uncle as well.
Mckenna Grace....Mary Adler (as McKenna Grace)
Octavia Spencer....Roberta Taylor
Michael Kendall Kaplan....Justin Gilmore
John M. Jackson....Judge Edward Nichols
Glenn Plummer....Greg Cullen
John Finn....Aubrey Highsmith
Elizabeth Marvel....Gloria Davis
Candace B. Harris....Carly Rosen
Jon Sklaroff....Seymore Shankland
Julie Ann Emery....Pat Golding
Keir O'Donnell....Bradley Pollard
Filmography links and data courtesy of The Internet Movie Database.