"All About Eve", a 1950 movie starring Bette Davis as "Margot Channing", Anne Baxter as "Eve Harrington", George Sanders as "Addison DeWitt" and Gary Merrill as "Bill Simpson".

Notice also Marilyn Monroe in a bit part as "Miss Casswell".

Bette Davis and Gary Merrill would later marry.

You can watch it on YouTube

Part 1 Part 2 Part 3 Part 4 Part 5 Part 6 Part 7 Part 8 Part 9 Part 10 Part 11 Part 12 Part 13