Who is this actor?

I've not heard of domh all fleeson

Oh my gosh?! he grew a beard! no way! he looks unrecognizable! now! he was in the live action Peter rabbit movies! me and my bros love Peter rabbit we forgot how good the first movie was like gosh! it was really good! but wow he grew a beard!!

he also wrote & starred in comedy series Frank of ireland,with his brother & dad,funny show

I knew the other 3 actors but not this guy! my logic served me well & therefore I got this question correct

oops😔😔