Casey Dellacqua was born in Perth, on February 11, 1985.

In women's doubles, she has reached the final at every Grand Slam tournament. In mixed doubles she won the French Open in 2011.

Dellacqua's best singles results were semifinals at the Texas Tennis Open in 2012 and Aegon Classic in 2014, quarterfinals at BNP Paribas in 2014, fourth round at the Australian Open in 2008 and 2014, and fourth round at the US Open in 2014. However, Dellacqua's career highlights results above all in doubles. She won three WTA doubles titles and one Grand Slam title in mixed doubles at the French Open in 2011

She announced her retirement in April 2018.

On August 28, 2013, she came out. Casey's partner is named Amanda Judd. The couple have a son, Blake Benjamin, of whom Amanda is the biological mother. Amanda wanted to give Casey the opportunity to pursue her tennis career.

Dellacqua declared that the arrival of the child has improved her way of playing and in fact the results have been seen: Grand Slam finals in doubles with her partner and friend Ashleigh Barty at the Australian Open, Wimbledon and Flushing Meadows, best ranking, round of 16 in Australia and in New York in singles.

In 2016, the family grew, with the addition of Andie, a daughter.