Around this time, Tennet competed in the "Sheilah Winn Shakespeare Competition" with classmate Phoebe Mason (Epsom Girls Grammar School Drama Leader 2008) and did quite well, winning four of fifteen awards.

She then took on the role of Dorothy in a major theatrical production of The Wizard of Oz based on the 1987 musical produced by the Royal Shakespeare Company at the Civic Theatre in September 2011, earning positive reviews for her portrayal of the character.

[5] Before leaving for the United States, she made an appearance on Underbelly NZ: Land of the Long Green Cloud as Julie Theilman, a courier working for Terry Clark of the Mr. Asia drug syndicate.

Since then, Tennet appeared in the miniseries When We Go To War and the joint Australia-New Zealand TV series 800 Words, along with various stage and voiceover credits.

In late 2018, Tennet, along with actors Esther Stephens and Aria Jones, formed a 60's doo-wop trio named The Up-Doos who have begun performing in several local Auckland venues.

While living in Los Angeles, California, she married fellow New Zealand actor Milo Cawthorne, with whom she has worked several times in the past, most notably on Power Rangers RPM and more recently on Blood Punch.

She began studying speech therapy at the University of Auckland after moving back to NZ with her then-husband[12] and as of July 2019, she graduated with her bachelor’s degree.