How we cite our quotes: All quotations are from All About Eve.
Quote #4
BILL: I've always denied the legend that you were in Our American Cousin the night Lincoln was shot...
This is one of many jokes about Margo's age. Bill references it to both tease her for her sensitivity about her age, and to show that he defends her from her critics. He's not worried about her age because he knows how he feels about her. Margo's the one always on the defensive about it.
Quote #5
MARGO: A milkshake?
Eve is offered a drink and Margo suggests a milkshake. Margo may be angry for always being described as "too old," but she has no problem trying to insult Eve's youth. Is this hypocritical behavior on Margo's part?
Quote #6
MARGO: "Cora." She's still a girl of twenty?
LLOYD: Twentyish. It isn't important. […] Margo, you haven't got any age.
MARGO: Miss Channing is ageless. Spoken like a press agent.
Margo has no illusions about what it means in the theater to be her age. The longer she attempts to play younger parts, the more likely she is to be considered delusional vs. ageless. Another Oscar-nominated film released in 1950 was Sunset Boulevard, in which an aging silent film star is clearly considered delusional for wanting to get back in the spotlight.