Amazon Prime Video has announced the first cast members for “ Boys of Tommen ,”  the upcoming adaptation of the bestselling book series of the same name, written by Irish author Chloe Walsh. Nancy Surridge is set to lead the cast as Shannon Lynch, described as “a shy and mysterious girl new to Tommen College,” and Conor Sánchez is Johnny Kavanagh, said to be “the golden boy of Tommen and Shannon’s love interest.” James O’Donoghue will play Shannon’s older brother, Joey, described as “troubled but loyal,” while Sophie McGibbon will take on Joey’s love interest, the “fiercely confident” Aoife Molloy. Per the official description, “Boys of Tommen” follows the “forbidden love story of Johnny Kavanagh, the star rugby player on the verge of a pro career, and Shannon Lynch, the talented but painfully shy new girl at the prestigious private school of Tommen College in Ballylaggin, Ireland.…