The pair will perform at the Sound of Musicals at the Princess Theatre at 7.30pm on Saturday, as well as in a Q&A, called Rob Mills and Jemma Rix, In Their Own Words, on Sunday at 11am at the Princess Theatre.

The inaugural Australian Musical Theatre Festival is well underway, presenting a four-day celebration of musical theatre in the form of shows, workshops, and parties, including a school's program and a new work being written during the festival.

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Festival manager Jane Forrest said the Australian Musical Theatre Festival was "so grateful to have attracted such an incredible line-up of actors, singers, coaches and industry insiders" along with its headline performers, Australian stage and TV stars Rob Mills and Jemma Rix.

"There is no doubt that our festival has cemented Launceston's reputation as a recognised centre for musical theatre excellence nationally," she said.

"Australian musical theatre fans have responded enthusiastically. Everyone has just been having a great time - there's an amazing feeling around the festival venues and we have seen lots of professional development happening.

"And for anyone wanting something a bit different there is a Theatre Ghosts Walking Tour departing from City Park Main Gate on Tamar Street at 2pm on Sunday."

To book tickets visit www.amtf.org.au.