[1] She began taking acting lessons by age 9,[2] studying at the Heckscher Foundation and the Neighborhood Playhouse in Manhattan.

[2] Beller's first professional acting role consisted of a giggle[3] on the radio version of Our Miss Brooks[2] when she was 12 years old.

[4] She portrayed Babby on The Brighter Day[5] and appeared on other radio programs, including Let's Pretend and School of the Air.

[1] On stage, Beller performed in summer stock at age 16 in the ingenue lead role in You Can't Take It With You.

Other summer stock roles were followed by a six-week tour in Leaf and Bough, which had three performances on Broadway.