Blonde heavily emphasizes Monroe's thirst for her father and how she fills that void with her husbands' presence, stipulated by calling DiMaggio and Miller 'daddy'.
It’s unclear whether Monroe ever met with her father face-to-face, but there were backdrop letters in several scenes.
The movie begins with Norma Jeane’s mother giving her a framed picture of a man she claims is her father. Marilyn envisions the same photo of her father as she was dying in the last scene.
Just like in the film, Marilyn's father's identity has remained a mystery. Gladys once told her daughter that her father was one of her superiors at RKO Studios. Report has it that Gladys also showed Marilyn a framed photo of the said father.
Charles Stanley Gifford, Glady's boss, has always been assumed to be Marilyn's father, though the speculations remained uncertain until this year. A scientist conducted a DNA test on a strand of Marilyn's hair and a cheek swab from one of Gifford's great-grandchildren and found that they matched, proving that Charles' was indeed her biological father.
Charles Casillo, who wrote the book Marilyn Monroe: The Private Life of a Public Icon, indicated that Marilyn managed to locate Charles Stanley Gifford. However, Gifford wanted nothing to do with Marilyn when she told him who she was. He responded, 'I'm married, and I have a family. I don't have anything to say to you. Call my lawyer.'
Gifford's rejection broke Monroe's heart and drove her on a quest for love and approval.