Sarah Chalke and Katherine Heigl play best friends Kate and Tully, together since childhood, through thick and thin, as they navigate school, uni then jobs in the same newsroom. They’re chalk and cheese at first glance but joined at the hip for decades, through tumult, pain and joy. Chalke plays adult Kate and Roan Curtis is Kate as an adolscent and later a highschooler in this addictive new series. What She Said’ Anne Brodie spoke with them.