Rose Byrne

Between her new film, “If I Had Legs I’d Kick You,” and her Apple TV+ series “Platonic,” the actress has created a diptych of stressed-out moms.

In Mary Bronstein’s film, Rose Byrne plays a therapist contending with a sick child, an absent husband, an uninhabitable home, and a world that seems nightmarishly bent on her failure.

This year’s edition of the festival offers inventive visions, in fiction and nonfiction, of passionate lives amid difficult circumstances.

From a café in Sydney, the Australian actress, who plays an aerobics guru on the Apple TV+ series “Physical,” discusses Vegemite, spandex, and her preference for Iyengar yoga.