Marais was attending NIDA when she was cast in the role of Rachel Rafter on the television series Packed to the Rafters. The series became a success and was instantly renewed. In February 2011 it was announced that Marais had left the show, with her final episode airing on 23 August 2011. Marais starred in the series from Season One until Season Four from 2008 to 2012. Marais made cameo appearances in the final episode of season 4 on 20 March 2012 and in the series finale on 2 July 2013. Marais also starred in Rai Fazio's film Two Fists, One Heart with fellow Perth actor Tim Minchin and Daniel Amalm which was released in March 2009. Marais guest-starred in the American series, Legend of the Seeker filmed in Auckland New Zealand, playing the role of the Mord'Sith Denna. After departing Packed to the Rafters, Marais relocated to Los Angeles to pursue a career in Hollywood. Marais then went to Miami, to film US drama, Magic City. The series lasted two seasons. After relocating back to Australia, Marais portrayed Australian transgender entertainer and activist Carlotta in a biographictelefilm for ABCTV Australia. Its worldwide premiere was on 19 June 2014. It was the No. 10 show of the night, and nationally won its timeslot with 811,000 viewers. Also in 2014, Marais had the lead role on Channel Nine's Love Child, where she played the character Dr Joan Millar. She has since appeared on all four seasons of this show. Since 2016, Marais had the lead role in Channel Ten's drama The Wrong Girl. Marais was nominated for the Gold Logie in 2017 and 2018
Personal life
Marais was engaged to former Packed to the Rafters co-star James Stewart in 2009. However, in May 2015 Marais announced that she and Stewart had ended their 5-year engagement amicably. Marais and Stewart have a daughter together born in May 2012. Marais was reported as saying she would return to work filming the second series of Magic City while Stewart would be the baby's full-time caregiver.
Filmography
Awards
Marais has won, and been nominated, for seven Logies in her time. Her first success at the Logies was in 2009, when she won the Logie for "Most Popular New Female Talent" and the prestigious Graham Kennedy Award for "Most Outstanding New Talent" for her role on Packed to the Rafters. For her role on this show, she was nominated for the Gold Logie in 2011 and nominated for "Most Popular Actress" in 2010, 2011 and 2012. In 2015, she was nominated for the "Most Outstanding Actress" for her role in Carlotta, and also nominated for the "Most Popular Actress" award for her roles in Carlotta and Love Child. Marais won "Most Popular Actress" in 2016 and 2017. Also in 2017, she was nominated for the Gold Logie and "Most Outstanding Actress" in 2017.