Thanks to this question here, is there any reason why Frank Costello does not speak with Irish accent like Pierce Brosnan in Foreigner movie? Actually Frank Costello grew up from an Irish Catholic family.

I have atleast 2 examples of well known established actors credited at the very end with the phrase "and introducing" before their name: Julia Roberts in Ocean's Eleven (2001) (in the end credits) Daniel Craig in Logan Lucky (2017) (on the posters at least; I haven't watched the movie yet) Co...