Betty Irene Thorner (born 23 February 1938) is a New Zealand former cricketer who played as an all-rounder, batting left-handed and bowling right-arm medium. She appeared in three Test matches for New Zealand between 1957 and 1961. She played domestic cricket for Wellington.
Thorner also represented New Zealand at field hockey. She married Russell Watt, a New Zealand rugby union representative, in Wellington in April 1961.