Jenna Coleman is expecting her first child. The ‘Sandman’ star was spotted cradling her baby bump at a special event to celebrate the opening of a new exhibition, Imaginary Conversations: An ERDEM Collection Inspired by Duchess Deborah, at London’s Chatsworth House on Wednesday evening (19.06.24). Jenna was wearing a green floral dress when she posed for pictures on a staircase at the event, while placing two hands under her bump. It comes six months after speculation that 38-year-old Jenna and her director boyfriend Jamie Childs, 35, had married after she was spotted with a chunky ring on her…