Mary Lee Robb Cline (15 February 1926 – 28 August 2006) was a radio actress during the 1940s and 1950s.
Robb was born in Streator, Illinois. Her father, Alex S. Robb, was an executive at NBC.
In 1939 her family moved to Los Angeles, California, where she attended University High School and University of California, Los Angeles.
Robb made her radio debut in 1947 on the Lum and Abner program. She also appeared on The Penny Singleton Radio Show.
As Mary Lee Robb, she is best known for playing Marjorie, Gildersleeve's niece, on The Great Gildersleeve. A small role in a 1948 episode of that program led to the full-time role of Marjorie, which she played until 1954.
Robb's first marriage, to Charles Vance Smith, ended in divorce. Robb left acting in the mid-1950s in order to raise their son, Robb Smith, and daughter Alexandra.
In 1983 she married William H. Cline, who died in 2005.
She died of heart failure at Desert Regional Medical Center in Palm Springs, California. Mary Lee Robb was survived by her daughter Alexandra, son Robb, son-in-law Alex, and daughter-in-law Melissa. Robb also left behind her two grand children, Robbyn and Tyler.