She was an American film actress, model, and singer. She was known as Betty Miller when she was a model when she went to New York to work as a model.
Joan was born in Pensacola, Florida, in 17 July 1911
In 1935 she went to Hollywood where she was signed in Columbia Pictures. While in Colombia.
Joan appeared in a number of films and worked with prominent men such as Ralph Bellamy, Melvin Douglas and Le Iris. It also caught the attention of studio tycoon Harry Cohen who wanted Joan for his wife.
After Colombia, Joan went to Warner Brothers where she appeared in a few films including International Squadron (1941) and Nine Lives Are enough (1941) with Ronald Reagan. More than one assistant actress from the leading lady.
She became very powerful when she finally married Harry Cohen in 1941 and retired from the movies.