For college, he attended Northwestern University, where he enrolled in the pre-med program to please his mother. He later switched to Speech & Drama, but never completed his degree. He gave his first public performance at Waveland Avenue Congregational Church located on the northeast corner of Waveland and Janssen. He lived across the street from the church. In 1965, he gave the church a generous contribution, a thoughtful letter, and a photograph of himself which had been requested by the minister and was displayed in the church's assembly room which was dedicated to Bergen. He cut out an "R" and a "G" from his family name and went from Berggren to Bergen on the showbills. Between June 1922 and August 1925, he performed every summer on the professional Chautauqua circuit and at the Lyceum theater in Chicago. Bergen had an interest in aviation, becoming a private pilot.