Noel Streatfeild's overlooked series about child actress Gemma Bow

Titles: Gemma, Gemma and Sisters
Author: Noel Streatfield
Publication: Dell Yearling, paperbacks (originally published in 1968)
Genre: Juvenile fiction/series
Setting: 20th century England

Description: Gemma is a child film star, daughter of actress Rowena Bow, but as she approaches adolescence there have been no parts for a while, which frightens her. When her mother is offered a part in America, Gemma is sent to live with cousins she has never met, 150 miles from London.