This is Dave Coulier, who plays Joey Gladstone. Joey is a comedian who wants to make something out of his life. Sometimes he's not ver mature, but he can be when he needs to. He works with Jesse to make a radio show. He wants to help out Danny take care of his daughters.
This is Jesse who is played by John Stamos. Jesse is a musician. He has his own band and wants to be like Elvis Pressley. He is the brother of Danny's wife and came to help him take care of his three girls. He's had about 1,000 girlfriends!