For her role as Maria Callas in Master Class, she won a Green Room Award and a Helpmann Award for Best Actress in a Play. She won a second Helpmann Award for Best Supporting Actress in a Musical for her role as Mercedes Cortez in the Australian musical, Eureka! In 2003, Muggleton completed a highly successful national tour of The Lion, the Witch and the Wardrobe, playing the White Witch with Dennis Olsen as The Professor. Muggleton and Olsen also devised and co-produced Marvellous Party!, a production that celebrates the words and music of Noël Coward, and which had two sell-out shows at the Concert Hall in the Victorian Arts Centre, a highly successful Victorian tour and has been seen at Capers, Melbourne (2003 and 2004), Friends Restaurant (Hyatt) Perth, Edwards Waterfront Mandurah WA (2004) and Canberra's Teatro Vivaldi (2004). She also appeared in her own solo cabaret show, which premiered at the Star Casino Showroom, and which will tour nationally. Out of Marvellous Party! came Darling It's Noel, produced by International Concert Attractions and directed by Rodney Fisher at the Sydney Opera House in May 2004 and at His Majesty's Theatre, Perth in June 2004. Muggleton is qualified as a speech and drama teacher. She is also a public speaker and can pilot single-engine planes. Muggleton ended 2008 with a nomination at the AFI Awards. Her role of Kathy Booth in City Homicide earned her the nomination for Best Guest or Supporting Actress in a Television Drama. In 2009, Muggleton and her business partner Bernadette Eichner founded Scene & Heard, a new acting school based in Sydney's Lane Cove. Within its first year, the business became so successful that they had to relocate it to new, bigger premises. Muggleton has also appeared in the thirtieth anniversary of The Man From Mukinupin for Belvoir Street Theatre, Sydney (2009) and in the two roles Louis and Ethel Reid in The Ruby Sunrise for Ensemble Theatre, Sydney (2009). In 2010, Muggleton has appeared as Bette Davis in the one-woman show Me & Jezebel at the Mackay Entertainment Centre (QLD). One week after it finished, she began rehearsals for the role of Chris in Calendar Girls, which toured nationally and took the role of Lillian in Madagascar for Black Swan Theatre Company in Perth, WA (October 2010). She also appeared in two episodes of the ABC series The Librarians. In 2011, Muggleton started