Ian McNamara, also commonly known as "Macca", is an Australian radio presenter, singer-songwriter and producer, best known for hosting the Australian Broadcasting Corporation's long running radio program "Australia All Over" on the ABC Local Radio network.
Fran Kelly is an Australian radio presenter, current affairs journalist and political correspondent who has hosted the Australian Broadcasting Corporation's Radio National program "Breakfast" since March 2005.
Richard Mercer is an Australian radio presenter.
 He was the host of the popular long-running program "Love Songs and Dedications" on the (sister) commercial radio stations Mix 106.5 (now KIIS 106.5) in Sydney and Mix 101.1 in Melbourne, where he was referred to as "The Love God".
 He now presents his new radio show "Your Song" on newly re-branded commercial station 101.7 WSFM from 7-10 pm Monday to Thursday.
Thomas Colin "Tom" Ballard (born 8 July 1989) is an Australian radio presenter and comedian.
Studio A is an hour-long live variety, comedy and sketch program produced as the RMITV Flagship production between 2008-2011 and was hosted by Dave Thornton and then later Tommy Little.
 Supporting cast included many up and coming comedians and media personalities including Jess Harris ("Twentysomething"), Alison Bice, Carl Chandler, Tom Ballard, Tommy Dassalo, Oliver Clarke, Xavier Michaelidies, Teegan Higginbotham, Nick Cody, Nat Harris, Anne Edmonds, Ted Wilson, Luke McGregor and John Campbell.
 The show featured weekly celebrity guests and an array of Melbourne’s up and coming talent.
 Guests included Peter Helliar, Colin Lane, Wayne Hope, Rove McManus, Adam Richard.
Ian James Cover (born 31 July 1956) is an Australian radio presenter, comedian, politician and author.
 He rose to prominence as a founding member of radio sporting comedy group the Coodabeen Champions, entered Victorian state politics in 1996, serving one term as a Liberal Party of Australia member of the Victorian Legislative Council, and subsequently returned to radio comedy.
 Cover has also been a radio presenter and newspaper columnist in his own right, and has written three books.
Singers of Renown was an Australian radio program broadcast on ABC Radio National for 42 years, and presented for every episode by John Cargher.
 It became the longest continuously running Australian radio program presented and produced by the same person, and Cargher himself became the longest continuous program presenter in the ABC's history.
Veronica Louise Milsom is an Australian radio presenter, comedian and actress.
 She co-hosts the afternoon drive time programme, "Veronica & Lewis", with Lewis Hobba on youth radio station, Triple J.
 The pair met in high school and subsequently wrote for and appeared in comedy current affairs program "Hungry Beast".
 Milsom has appeared on several ABC television shows, including "Shaun Micallef's Mad as Hell", "Back Seat Drivers" and "It's a Date", as well as Channel Ten's "The Project" and "A League of Their Own (Australian game show)".
 In 2014 she performed live solo shows in The Melbourne and Sydney International Comedy Festivals.
Patricia Karvelas is an Australian radio presenter, current affairs journalist and political correspondent who has hosted the Australian Broadcasting Corporation's Radio National program "RN Drive" since January 2015 and "Karvelas", an Australian television commentary program broadcast weekly on Sky News Australia .
 She previously worked for "The Australian" newspaper, covering federal politics.
Ken Sparkes (20 July 1940 – 11 September 2016) was an Australian radio presenter, television personality (actor, singer, host), disc Jockey and voice-over artist, he also worked as an investigative journalist, sportscaster/commentator and launched briefly a pop career and co-founded his own record label.
 He was a presenter of radio programs, including presenting the breakfast program on Adelaide's 5KA.
 His early career was at Melbourne's 3UZ, before launching a career in television in the mid-60's.

Question: What variety sketch program included a supporting cast consisting of an Australian radio presenter born in 1989?
Answer: Studio A