Complex sentence: In February 2006, Helen McCrory was cast as Bellatrix Lestrange, but had to drop out due to pregnancy, and in May 2006, Helena Bonham Carter was cast in her place.
Split into simpler sentences: In February 2006, Helen McCrory was cast as Bellatrix Lestrange, but dropped out due to her pregnancy. In May 2006, Helena Bonham Carter was cast in her place.