- Wendy Armstrong is the wife of Vic Armstrong, the sister-in law of Andy Armstrong and Jennifer Caputo, the mother of Bruce Armstrong, Scott Armstrong, Nina Armstrong and Georgina Armstrong, the aunt of James Armstrong and the mother-in-law of Johnny Rawlings.
- Wendy Armstrong was a stunt performer in the DC Entertainment production Wonder Woman.
- Wendy Armstrong was an additional stunt performer and a stunt double for Margot Kidder in the DC Entertainment production Superman. It was on the set of this film that she met her husband, who was a stunt double for Christopher Reeve.
- Wendy Armstrong was a stunt performer in the DC Entertainment productions Superman II, Superman III and Red 2.