Renee Zellweger won best actress at the Oscars on Sunday for her portrait of Hollywood legend Judy Garland in “Judy,” a biographical drama exploring the singer’s personal and professional turmoil at the end of her life. The 50-year-old gave a speech,saluting other nominees – Cynthia Erivo for “Harriet,” Scarlett Johansson for “Marriage Story,” Charlize Theron