“Happy International Women’s Day!” I walk into the interview room and greet Octavia Spencer, who’s wearing a polka-dot skirt that I’m about to find out is as joyful as her demeanour. “Oh yes, that’s today! Great! Yes! Yes,” she replies, oozing an enthusiasm that is undeniably infectious. The Oscar-winning actress plays the head of the Amity faction in Veronica Roth’s incredibly successful Divergent series. She’s one of the new characters introduced in Insurgent, which is the reason for my trip to LA this past weekend. Along with Naomi Watts, who plays the Factionless leader Evelyn, Octavia joins Shailene Woodley and Kate Winslet, who reprise their roles from the box-office-busting first movie. It may have been a…