Pierce Brosnan's Son Trades Hollywood for D.C.

Pierce Brosnan's handsome son has become Malia Obama's mirror image ... SHE left Washington for Hollywood and he did the reverse.

17-year-old Dylan is working as an intern for Mass. Senator Ed Markey -- doing gopher things like grabbing burgers for the staff.

As we reported ... Malia fetched coffee during her week as an intern for Halle Berry's new show,

2 things about Dylan:

Thing 1 -- He's learned the D.C. code. He doesn't answer questions
Thing 2 -- He's gonna slay a bunch of chicks on the Hill