Killeen has been to law school, tried her hand at stand up comedy and has been a voice over artist for almost 20 years. She worked on radio, has published numerous children's books, was a newspaper columist and began her career on TV in debating shows. She became a regular "beauty" on Beauty and the Beast, but made her big break as host of the Australian version of Big Brother in 2001.

Knight graduated from Charles Sturt University, Bathurst, and began work at 2WG Wagga Wagga. She accepted an offer from Mix 106.5 Sydney, then moved to the ABC to work with Radio National and Triple J. She began television work on the ABC show "Landline", then moved to Channel Ten as a political reporter in Canberra. She headed Ten's US Bureau for 3 years, then returned to Australia and became co-anchor of Sydney's First at Five bulletin in January 2006.

Monika's career began at radio station 6PR, taking up roles of drive-time presenter and newsreader. She moved to television at TVW7 Perth in 1990 as a journalist, before becoming host of the WA edition of Today Tonight in 1997. As Perth's only locally produced current affairs programme, host Monika became a well known and highly respected journalist in the community. She is married to Grant Willesee (son of Terry).