Prime Video’s “The Boys of Tommen” has added Jonathan Forbes, Cobhan O’brien, Harvey Moloney, Tristan Heanue and Lewis Brophy to its cast.

Forbes (“Catastrophe,” “The Rainmaker”) joins as Johnny Kavanagh’s father John Senior, O’brien (“Foundation”) and Moloney (“Krimi”) as Shannon Lynch’s younger brothers Tadhg and Ollie, Heanue (“Clean Sweep”) as Aoife Molloy’s father Tony Molloy and Brophy (“The Virtues,” “Kin”) as Podge.

The adaptation of Chloe Walsh’s “Boys of Tommen” previously announced Nancy Surridge would be playing Shannon while Conor Sánchez is Johnny Kavanagh and James O’Donoghue plays Joey Lynch.

Sophie McGibbon also stars as Aoife Molloy, Amelia May as Claire Biggs, John Hewson as Gerard Gibson, Indy Lewis as Lizzie Young, Alex Dunne as Hugh Biggs, Dixie Egerickx as Katie Wilmot and Jamie Schneider as Patrick Feely.

Daisy Jacob joins as Bella Wilkinson, Jonathan Heed as Cormac Ryan, Cathal Ó Síocháin as Ronan McGarry and James Craven as Pierce O’Neill.