Casey Affleck and Kenneth Lonergan on the red carpet at the Vanity Fair Oscars party

The transcript describes a post-Oscar party at Vanity Fair, highlighting Casey Affleck's win for Best Actor and his brief reaction. It also mentions Kenneth Lonergan's win for Best Screenplay for 'Manchester by the Sea', noting the film's multiple awards.

What was the atmosphere like at the Vanity Fair Party?

Who was the best actor winner mentioned in the text?

What did Casey Affleck say about winning the Oscar?

Who is Kenneth Lonergan in relation to the Oscar event?

Which film won a couple of awards at the party?