Selena Gomez, Steve Martin and Martin Short chat with ET’s Denny Directo at the season 4 premiere of Hulu’s ‘Only Murders in the Building,’ which debuts Aug. 27 with new episodes dropping weekly. Selena describes her current era of life, calling it ‘joyful,’ amid her romance with Benny Blanco. Steve and Martin react to the idea of getting Diane Keaton on the show, making it a full ‘Father of the Bride’ reunion. Plus, Selena shares which cast member was the most ‘demure’ this season.