Susan-Kate Heaney grew up in Port Jefferson Station, New York, where her passion for acting began at a very young age. Susan-Kate Heaney is a graduate of New York University's Tisch School of the Arts with a BFA in Acting, and has studied at the Abbey Theater in Ireland, HB Studios and with Lesly Kahn.

For years, she has been performing her comedic solo show Mop-oholic at various theaters in New York and Los Angeles (UCB, the PIT, Second City, iO West). The show is a retelling of her life spent talking to her mop collection and it's all true! She has over 35 mops, each with a different personality.

Most recently, Susan-Kate can be seen on Crazy Ex-Girlfriend (2015), The Mindy Project (2012), and Masters of Sex (2013), as well as performing her one-woman show Facebook with Mom and variety show The Quirks live at Comedy Central Stage, VS Theater and The Hollywood Fringe.

In 2012, Susan-Kate moved to Los Angeles to focus on film/television work.