Rosemary Clooney was 26 years old when she starred in the classic Christmas film "White Christmas" in 1954. The film was a huge success and became a beloved holiday classic, with its iconic songs like "White Christmas" and "Sisters" becoming beloved hits. Rosemary Clooney's performance as Betty Haynes was critically acclaimed and helped to cement her status as a Hollywood star. She would go on to have a long and successful career in film, television, and music, earning multiple Grammy Awards and an Emmy Award nomination.