Tell-All is many things: A Sunset Boulevard-inflected homage to Old Hollywood when Grand Dames like Bette Davis and Joan Crawford ruled the roost. A Douglas Sirk-inspired melodrama full of big gestures and muted psychic torment. A veritable Tourette's syndrome of rat-tat-tat name-dropping, from the A-list to the Z-list. A merciless send-up of Lillian Hellman's habit of butchering the truth that will have Mary McCarthy cheering from the beyond.