Nicola Coughlan says ‘Bridgerton’ Season Three will follow Penelope and Colin’s love story. The ‘Derry Girls’ star – who plays the youngest Featherington sister and the person behind the ‘Lady Whistledown’ persona – revealed the “big secret” on her social media for the upcoming season of the popular Netflix period drama based on the series of novels by Julia Quinn. On Sunday (15.05.22), the 35-year old actress wrote on her Instagram Story: “Like Lady Whistledown I’ve been keeping quite a big secret for quite a long time … but I can finally tell you that @bridgertonnetflix Season Three is Colin…