Lina Lamont (Jean Hagen)’s Timeline and Summary

Lina attends the premiere of her latest hit film, The Royal Rascal, with Don.
Don tells her that, contrary to what the press says, there's nothing between them. Never has been.
Kathy hits Lina in the face with a cake she intended for Don; Lina gets Kathy fired from her job at the Coconut Grove.
While filming The Dueling Cavalier, Lina tells Don that she had Kathy fired. He tells her he hates her.
After it's announced that Cavalier will be a talkie, Lina takes diction lessons. It does not go well.
Lina struggles to speak into the microphone while filming, and the Cavalier's screening is a disaster.
It's decided that Cavalier will be a musical, The Dancing Cavalier, and Lina will lip sync to Kathy's voice.
Lina finds out that Kathy will get on-screen credit for dubbing Lina's voice, and she threatens to sue R.F. unless he strips Kathy of her recognition.
Cavalier's premiere is a success. Kathy is forced to dub Lina's voice live for the audience.
Lina's exposed as a fraud when Don, Cosmo, and R.F. lift the curtain to reveal Kathy singing. Oh, snap.