Anderson makes glorious movie stars of his two newcomers. Cooper Hoffman, son of the late Philip Seymour Hoffman, is eerily assured as Gary Valentine, a heavy-set kid with iffy skin whose child-actor career in TV and movies is coming to an end, and is therefore turning his various side-hustles into the main event, running his own cockamamie company selling waterbeds. Alana Haim, of the pop band Haim, is superb as the permanently exasperated Alana Kane, a young woman with Barbra Streisand’s beauty and charisma; appropriate, perhaps, as Streisand’s notoriously quick-tempered onetime boyfriend Jon Peters is played by Bradley Cooper in a walk-on role, as one of Gary’s dissatisfied waterbed customers.