Blake was born in a small town in Outback Queensland, Australia. She graduated from St Peters Lutheran College in Brisbane, duxing Theatre. She earned her bachelor's degree from the University of Queensland, with a double English major.
Blake has tutored in English and mathematics, worked in fashion retail, and was a cheerleader for both the Brisbane Broncos football team and the Gold Coast Rollers basketball teams. She was a contracted dancer on The Footy Show for Channel Nine in Brisbane. For two years, she was the secretary of the Queensland branch of the Australian Cinematographers Society.
After marrying her husband in Las Vegas in 2000, Ally moved to Melbourne. In 2007 her first child, Bridget, was born.
In 2003, Ally's first romance novel, The Wedding Wish, was published by Harlequin Mills & Boon. This book was nominated by industry magazine Romantic Times as Best First Series Romance of 2004. Since that time she has sold 16 novels, both for the Harlequin Romance and Modern Heat imprints. In 2007 she was nominated for the reader judged HOLT (Honoring Outstanding Literary Talent) Medallion for Best Traditional Romance published in 2006.
Ally has now sold over one million books worldwide in over twenty-five countries. She has taken courses at public libraries and romance writing conventions and has appeared in the print media and on A Current Affair. She also designs romance author websites including those for award winners Liz Fielding, Lucy Gordon and Trish Wylie as well as her own