Comeau was born in Brampton in 1984. She attended Mayfield Secondary School in the Dramatic Arts Programme. At Mayfield, she started competing in the Canadian Improv Games.
Comeau's interest in acting began at the age of 9 when she started doing impersonations of Dana Carvey's character Garth from Wayne's World. She studied at Humber College (in their Comedy Programme), and with the Second City Conservatory. She started touring for Second City Theatricals on cruise ships, then came home to Toronto to join the Second City Mainstage cast in 2011 with Carly Heffernan, Nigel Downer, Alastair Forbes, Jason DeRosse and Inessa Frantowski.
She continues to act and tour with her sketch and improv partner Connor Thompson as The Lusty Mannequins. She is currently the Head Writer of Chef in Your Ear for The Food Network Canada.
She has contributed to Today's Parent, The Walrus Laughs, CBC's Punchline, She Does The City and written for YTV's The Zone. She has performed with the likes of Martin Short, Colin Mochrie and John Cleese.
Ashley has been nominated for 'Best Ensemble" at the 2014 Dora Mavor Moore Awards and several Canadian Comedy Awards for Best Revues/Best Ensemble 2013/2014. She was recently named Best Female Improviser in Toronto by Now Magazine's 'Best Of 2015 Awards."
- She is a Leo.
- She almost became a funeral director.
- She used to be a tour guide.