Mary-Kate and Ashley Olsen have sparked rumours they are not getting on. The 22-year-old twins - who have been in the public spotlight since they were nine-months-old after sharing the role of Michelle Tanner on hit US TV show 'Full House' - have reportedly organised separate meetings for their clothing line so they won't have to see each other. A source told the New York Post newspaper: "All meetings for their clothing line, they will not do together. Something happened between them, and they haven't worked it out. It's been going on for a while." Mary-Kate recently revealed she often argues with Ashley, but thinks their differing views help their creativity. She said: "We don't agree all the time. The way we go about business or designing or making a decision is that we come at it from two completely different angles that at the end of the day, even when we don't think we're agreeing with each other, we are agreeing. We're just getting there in different ways. Unless you're a twin, you honestly can't know how close twins can be."