Sarah Ferguson, Duchess of York, wants a role in ‘Bridgerton’. The 64-year-old author previously made a cameo appearance in ‘Friends’ and recently had a small part in a Hallmark movie, and she’s hoping to build on that with more work in TV and film. She told Britain’s HELLO! magazine: “I made a cameo in the Hallmark movie ‘An American in Austen’. “I’d like to do more walk-on parts and voiceovers and I’ve asked my agent if I could get a walk-on part in ‘Bridgerton’. “ And Sarah will also be working behind-the-scenes too. She said: “Hallmark have asked me to write five romcoms and [my novel] ‘He…