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New Cast Members Join Prime Video’s ‘The Boys of Tommen’

Prime Video's 'The Boys of Tommen' welcomes new cast, including Jonathan Forbes and Cobhan O'Brien. Additional actors join the series, enhancing its growing ensemble.

9/21/2026, 2:45:59 PM

The upcoming series on Prime Video, "The Boys of Tommen," has announced an expansion to its cast, featuring several notable actors. According to Variety, Jonathan Forbes, known for his roles in "Catastrophe" and "The Rainmaker," will take on the role of John Senior, the father of Johnny Kavanagh. In addition to Forbes, the series has welcomed Cobhan O'Brien, who was previously seen in "Foundation," along with Harvey Moloney, recognized for his work in "Krimi." O'Brien and Moloney will portray Tadhg and Ollie, the younger brothers of the character Shannon Lynch. Their inclusion adds a dynamic layer to the family-centric narrative of the show. Tristan Heanue, known for his work in "Clean Sweep," is also part of the new cast, stepping into the role of Tony Molloy, the father of Aoife Molloy. Another new addition is Lewis Brophy, whose specific role in the series has not yet been disclosed. This casting update builds upon the initial ensemble that was already generating excitement for the series, which blends elements of drama and family relationships. Fans of the genre can look forward to how this expanded cast will contribute to the storyline when "The Boys of Tommen" premieres. The series has already garnered attention for its intriguing premise and a strong lineup, and with this new cast, it seems poised for an engaging release.

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