[1] Johnson was a native of Los Angeles[2] whose study of drama began when she was six years old.

[3] Among her many stage, TV, and screen credits, Johnson created and hosted her own TV variety show in Dallas, Texas, Gerry Johnson's Variety Fair in the 1950s[3] and played Lady Bracknell in The Importance of Being Earnest and several characters in Under Milk Wood in the opening season of the Dallas Theater Center.

[1] After moving back to Los Angeles in 1961, she co-hosted on Red Rowe's Panorama Pacific.

[2] Johnson provided voices for The Flintstones and other Hanna-Barbera productions, and guest-starred on Bewitched.

In 1964, she was hired by Joseph Barbera as the new voice of Betty Rubble for the final two seasons of The Flintstones, replacing Bea Benaderet who left the series[1] due to scheduling conflicts while she was starring in the series Petticoat Junction.