Postscript is available to pre-order now. 

Author Cecelia Ahern has confirmed that she has written a sequel to her best-selling novel, PS I Love You.

Postscript will be published in the autumn and continues the story of Holly Kennedy and Gerry Clarke.

Her first book focused on Holly and Gerry's relationship and the ten subsequent letters Holly received after Gerry's death. Each letter – planned by Gerry prior to his death – ended with "PS I Love You".

Ahern announced the news of the new book on Twitter on Monday, writing, "I’ve done it. I’ve written the sequel to PS I Love You and it’s titled Postscript.

"It’s the PS to my PS of 15 years ago and writing it has been an emotional experience. I don’t know how I’ve succeeded in keeping this a secret for so long but I’ve been bursting to share it.

"Postscript will be published this autumn. I hope you’ll welcome back Holly...and Gerry...and ugly cry through the story as much as I did."

READ MORE: The Documentary About Katie Taylor's Life Is Coming To Netflix

READ MORE: Irish Tatler's 10 Most Inspiring Female Trailblazers Ahead Of IWD