In 1952, she met the Eleventh Doctor at a Hollywood party, and he "accidentally" accepted a marriage proposal from her. He tried to avoid it, but ended up leaving the party with her to get married, apparently making her the Doctor's spouse. Marilyn got the Doctor's phone number and later attempted to call him, though he denied the legitimacy of the chapel. (TV: A Christmas Carol) Despite this, River Song later mentioned her among the other spouses of the Doctor. (TV: The Husbands of River Song)
When Space Pilot 692 7896 was going to die in a solo spacecraft after a total systems failure, she thought of Marilyn Monroe. Dying that way was not the glorious exit that she had expected, but she had an in-flight recorder on board of the spacecraft. She thought that she would be immortalised on camera like Monroe, James Dean and River Phoenix. (HOMEVID: Scout Ship)
Behind the scenes
In Good Night, the Doctor calls a farewell to an unseen River Song and asks her to "tell Marilyn she'll have to use the biplane".