Complex sentence: The movie that she was to act in, "No Leave, No Love", which starred Van Johnson, required her to lose weight, and the studio doctor had her on thyroid and pituitary capsules as well as a strict diet.
Split into simpler sentences: The movie that she was to act in, "No Leave, No Love", co-starring Van Johnson, required her to lose weight. The studio doctors reportedly had her on thyroid and pituitary capsules as well as a strict diet.