Mary's Big Secret

{{short description|1928 film}}

{{Use dmy dates|date=October 2020}}

{{Infobox film

| name = Mary's Big Secret

| image =

| caption =

| director = Guido Brignone

| producer =

| writer = {{ubl|Viktor Klein|Paul Langenscheidt (novel)}}

| narrator =

| starring =

| music = Bernard Homola

| editing =

| cinematography = {{ubl|Akos Farkas|Gustave Preiss}}

| studio = Lothar Stark-Film

| distributor =

| released = {{Film date|1928|03|23|df=yes}}

| runtime =

| country = Germany

| language = Silent
German intertitles

| budget =

| gross =

}}

Mary's Big Secret (German: Marys großes Geheimnis) is a 1928 German silent film directed by Guido Brignone.Holmstrom p.109

The film's art direction was by Robert A. Dietrich.