K.J. Yossman Emma Appleton (“The Witcher”) and Bel Powley (“The Morning Show”) have nabbed the lead roles in Working Title Television’s forthcoming adaptation of Dolly Alderton’s memoir “Everything I Know About Love.”Appleton is currently filming FX series “Pistol,” about the Sex Pistols, where she plays the tragic Nancy Spungen, who was murdered by her boyfriend, Sex Pistols bassist Sid Vicious.