Terri Irwin Absent as Robert Irwin Films Show

's spin-off has wrapped filming in .

And insiders now say that the 22-year-old's high-profile mother, , was a surprising 'no show' while the reality dance competition was still in production.

Terri built a reputation as a 'helicopter mum' after staying close to Robert behind the scenes as her beloved son filmed the last two seasons as co-host of ...Get Me Out of Here.

The 61-year-old was also seen dutifully cheering her boy on to victory as he filmed last year, which Robert won with .

Still, exclusive sources to the Daily Mail have revealed that production personnel 'heard nothing' about Terri stopping by the set of Robert's new show, Dancing with the Stars - The Next Pro.

And even though some of the series was filmed at the Irwin family's Australia Zoo, it is understood that Terri did not feature in any scenes shot there.

Another source, who was unfamiliar with the footage filmed, added that the show will remain in post-production for several weeks.

'There is a chance that Terri might have filmed a cameo [secretly], but that is unlikely,' they said.

Terri's absence has 'definitely been noticed', one source close to the production told Daily Mail last month.

'Terri hasn't been around during filming at all,' the insider added. 'It's quite a change from what people are used to.'

A different insider added that producers are banking on Robert's star power to lure viewers and say that he is prominently featured throughout the show.

'Fans can look forward to a wholesome family reality series,' the source said, dismissing early reports that the show would focus on Big Brother-like behind-the-scenes drama.

The Disney/ BBC production features hopefuls trying out for a role on Dancing with the Stars.

All the cast members are based in America and are competing for a spot as a professional dancer on DWTS US.