Most well known for her role as Jessica Harrison on the popular BBC series Casualty, Kearney is also notable for portraying Emma Barton and Debbie McGrath on the respective soap operas Emmerdale and Brookside.
In her early years, she acted in numerous Liverpool Playhouse Youth Theatre productions and was discovered by a Mersey Television scout, who promptly secured her an audition for Brookside.
In 2011, she played Louise Scanlon on the short-lived television series Justice.
A native of Liverpool, England, she is the daughter of Barbara and Gerard Kearney and has three brothers, including professional soccer player Tom Kearney. She and her fiance Eddie Foo welcomed a son named John Gerard in the summer of 2010.
She and Damian Lewis were both in the cast of the TV miniseries The Forsyte Saga.