[3] Foster was born in Montreal, Quebec, and raised in Cambridge, Ontario.
[4] He began his comedy career in the 1980s as a regular performer at Yuk Yuk's,[5] later expanding into national touring, and released his debut comedy album Overworked and Underlaid in 1996.
[6] He has since also released the albums Half a Double CD (2010), Prickly (2012) and Unchecked (2021).
[7] In 2019 he collaborated with a musician from Nanaimo, British Columbia, whose name was also Glen Foster, on the title track for the musician's EP Party Out There Tonight.
The two men had previously performed together in a mixed comedy-music show billed as The Glen Fosters Experience.