Who played Lorelai Gilmore in 'Gilmore Girls'?

Who played Josh Lyman in 'The West Wing'? In which TV series is Hal a main character? Who played Malcolm in 'Malcolm in the Middle'? Who played Lois in 'Malcolm in the Middle'? In which TV series is Lorelai Gilmore a main character? Who played Rory Gilmore in 'Gilmore Girls'? In which TV series is Rory Gilmore a main character? Who played Luke Danes in 'Gilmore Girls'?