Raised in Los Angeles after her father's early death, Gibson entered entertainment as a toddler, securing an agent before age three and working as a calendar girl in postcards and ads. In 1951 she won the Miss Glamour in Miniature title and debuted in the film I’ll See You in My Dreams, beginning a prolific child-acting career.
During the 1950s and early 1960s she appeared in 34 films and rough…