Kristen Stewart chats with ET's Matt Cohen about receiving PSIFA's Spotlight Award for her portrayal of Princess Diana in 'Spencer.' In lieu of a traditional in-person acceptance speech at the Palm Springs International Film Awards, Stewart shares all of her tributes and shout outs for ET! The actress opens up about the 'joyful' experience of portraying the People's Princess. She also reacts to the latest generation of 'Twilight' fans who discovered the hit franchise on Netflix. Plus, Stewart reflects on the 20th anniversary of her early role in the hit 2002 thriller 'Panic Room.' 'Spencer' is in theaters now.

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