Hilary Duff's comeback album has been put on hold.

The 26-year-old former "Lizzie McGuire" actress took to Twitter to let her fans know that she is delaying the release of her 2014 album. Duff's fifth studio album was scheduled to be released in October and would have been her first album in seven years.

"Guys hate to break this news but the album won't be out in October," she told millions of her followers. "You will have to wait a few more months. Love all the excitement tho."

Duff did not disclosure the reason behind the unexpected delay nor did she mention a new release date.

In July, the singer released the first single from the album, "Chasing the Sun," and followed up with "All About You" last month. The singer said "'Chasing the Sun" "is a light and fun summer song that I hope helps people to feel a little more carefree." It was written by Colbie Caillat, Jason Reeves and Toby Gad.

The untitled album would have been the follow-up to 2007's "Dignity." Duff's upcoming album includes a ollaboration with Ed Sheeran.

"The album is very positive," Duff told Billboard in August. "It's very up, but it does talk about...there's a song called 'If I Fall,' which is about me taking a step back and kind of shutting down my whole business, and everyone not believing in me and me being really scared to be alone after I'd been surrounded by 100 people for five years of my life."

The untitled album also includes a song expressing her feelings about her recent separation from husband Mike Comrie. The couple, who are parents to 2-year-old son Luca, split in January after getting married in 2010. However, the two remain close friends.

"[There's] a song about my separation and my love for this person that maybe we're not meant to be together, or maybe we are," she told Billboard. "I mean, it's very, very personal, but I would say that it has a happy spirit to it, which is me."