- Was only 11 years younger than the actor who played his on-screen father in Neighbours (1985), Alan Dale.
- Left Neighbours for 11 years, before returning to the show in 2004. Dennis claimed he regretted leaving.
- Both Stefan's real sons have the same first name as his on-screen Neighbours-character's boys - estranged biological son Cameron Robinson and step-son Declan Napier.
- Worked as a chef before becoming an actor.
- Son Cameron was born in January 2002
- Son Declan was born in August 2005
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