EMILY Blunt admits she doesnt always get on with her costars. The British actress - who has previously worked with Anne Hathaway and Meryl Streep - has revealed she does not always find harmony on movie sets. Although Blunt didnt dish the dirt on exactly who was a nightmare to work with she lets on it was a really dull time of her life that she never wants to repeat again. Working with different actors can be easy and it can be difficult, she said. Sometime you strike gold with the on screen chemistry and blow it out of the water, and sometimes its like...paint drying SS