James or?Jimmy is Michael's son in Grand Theft Auto V. He may be involved in helping out Michael, Trevor, and Franklin on their heists, but that has yet to be confirmed. He can be seen in GTA V's Second Trailer, both talking to his dad in a car as well as hanging on to the mast of a yacht that is being transported down a highway. The IMDB page listed for GTA V has Jimmy being voiced by Danny Tamberelli.?Jimmy is a pothead, with no job, he avoids hanging out with Michael, he even drugs him, takes his car and moves out of the house. Jimmy loves to hangout with Trevor, he is even available to play tennis with, in hangout activities.