<prompt> Bhala ukuqhubeka kwalesi sigaba - Njengoba esevele edlale i-England U16 ngo-2011, Wenza i-debut yakhe yeRiphabhlikhi yase-Ireland U19 ngoSepthemba 2014, ngokunqoba ngo-10 ngokumelene neNetherlands U19. NgoSepthemba 4, 2015, wenza i-debut yakhe neRiphabhlikhi yase-Ireland U21 ngokunqoba ngo-4-1 ngokumelene neQatar U23 emdlalweni wobungani eGigg Lane. Ngomhlaka 25 Mashi 2017, uCullen wahola iRiphabhlikhi yase-Ireland U21s ukunqoba i-10 ukunqoba iKosovo U21 ku-UEFA Under-21 Championship Qualifier  <response>: . futhi. 