Hollywood Professional School was a private school in Hollywood, California. Initially established as a music conservatory by pianist Gladys T. Littell in 1921 under the name Hollywood Conservatory of Music and Arts,[1] the school quickly expanded its offerings into theater and dance as well as music. In 1929 the Hollywood Professional School (HPS) was established by Viola Foss Lawler as a companion private school to the conservatory, with both schools operating legally as a single institution under the Hollywood Conservatory of Music and Arts name. In 1944 the school was purchased by Bertha Keller Mann and it ceased teaching the arts and became solely a private school teaching traditional academic subjects in grades K-12 to mostly children working in the entertainment business or competitive athletics in Los Angeles.