The aspiring actor warmed the nation's hearts after appearing on the television documentary Love On The Spectrum, which followed the dating lives of people on the autism spectrum.

"Before [appearing on the show], what I considered successful was being in a job, having your own house and being married and having children," he told the Mercury.

"But now, the life of an actor, that's what I call success."

Before the reality program, Theo, from Wollongong in NSW's Illawarra region, never imagined himself to be standing front and centre at Sydney Town Hall speaking about his life to hundreds of people but that's exactly what he'll be doing on August 5 for TedX.

"I was surprised, but also keen [when I was asked to do it]," he said.

"I'll be talking about my life journey and how my views on success have changed."

A passionate animal activist, nature lover and cook, Theo is a strong believer it's people's differences that make them special.

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Embracing his differences has led him to an appearance on Ellen in the US; the creation of a successful podcast, Mr A+; scoring a small role on the children's program Hardball; and was recently featured as a celebrity guest for the online cooking show Bone Apple Tea, which raises money for charity.

"Not only was it a lot of fun but a great learning experience," he said of the cooking show.

"I was the first celebrity, and they want to bring me back as often as they can."

Theo recently decided to quit his job to pursue an acting career full-time and continue working on his weekly podcast which regularly features celebrity guests.