In September 2012, Rebel began her romantic love affairs with Matt Lucas. Matt Lucas is an actor, comedian and a screen writer. He is also her Bridesmaids co-star. As a boyfriend and girlfriend, they began living together till 2015. She is not married and divorced yet.
Rebel who is allergic to dogs was raised in a house swarming with beagles. Her mother is also a professional dog handler. As a child, she joined Tara Anglican School for Girls and she completed her second education from there in 1997. She also has a degree from Australian Theatre for Young People. She is also a graduate of University of New South Wales from where she received her law degree in 2009. Rebel who once dreamed to be a mathematician has been active in acting since 2002. She appeared in the stage musical The Westie Monologues in 2002. The following year she appeared in the TV series Pizza playing the role of Toula. That year she also appeared in the movie Fat Pizza. She got her rise in fame after she appeared in the movie Bridesmaids. Her breakthrough role came in 2012 after she starred the role of Fat Amy in the musical movie Pitch Perfect. For her role in Super Fun Night, she earned the salary of $65,000 per episode and her net worth is said to be around $2.5 Million.
