The hyperactive love child of Page Six and Whatever Happened to Baby Jane? caught in a tawdry love triangle with The Fan. Even Kitty Kelly will blush.

Soaked, nay, marinated in the world of vintage Hollywood, Tell-All is a Sunset Boulevard–inflected homage to Old Hollywood when Bette Davis and Joan Crawford ruled the roost; a veritable Tourette’s syndrome of rat-tat-tat  name-dropping, from the A-list to the Z-list; and a merciless  send-up of Lillian Hellman’s habit of butchering the truth that will have Mary McCarthy cheering from the beyond.

Our Thelma Ritter–ish narrator is Hazie Coogan, who for decades has tended to the outsized needs of Katherine “Miss Kathie”  Kenton—veteran of multiple marriages, career comebacks, and cosmetic surgeries. But danger arrives with gentleman caller Webster Carlton Westward III...