ET chats with Reese Witherspoon and Will Ferrell at the New York City premiere of ‘You’re Cordially Invited,’ streaming on Prime Video starting Friday. Reese shares an update on the upcoming ‘Legally Blonde’ prequel series, ‘Elle,’ calling the casting search an ‘eerie’ glimpse into the past. Plus, she and Will reminisce on first meeting more than 20 years ago on set of ‘Saturday Night Live.’