Yes, it really has been 20 years since Alanis Morissette first sang about "rain on your wedding day", and the Nineties star is celebrating the milestone with a rerelease of her hugely successful album 'Jagged Little Pill'.

Alanis Morissette at the ELLE Women in Music CelebrationAlanis Morissette is bringing 'Jagged Little Pill' back

The 4-disc package will come complete with 10 previously unreleased demos and a full live concert from the year of its release, and will be available via Rhino on October 30.

In a statement, the 'Ironic' hitmaker said, "I'm super excited to share this music with a whole new generation of peeps, as well as people who have grown along with me over the last two decades.

"Thankfully, these songs have stood the test of time for me, and in their timelessness, I am thrilled to honor and reflect on them as well as the last 20 years of my life and career."

According to Rolling Stone, the bumper reissue will feature a remastered version of the original album and previously released acoustic take on the LP, as well as 10 demos recorded before, during and after the 1995 album's launch, including 'The Bottom Line', the first song Morissette wrote with 'Jagged Little Pill' producer Glen Ballard. 

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On top of that, there will also be a full live concert recorded at London venue Subterranea on September 28, 1995, featuring Jane's Addiction's Chris Chaney on bass and Foo Fighters' Taylor Hawkins on drums.

Hardcore Morissette fans will also be pleased to know she's throwing in various ephemera from her personal collection, including never-before-seen photos and a reflective essay.

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The included demos are 'The Bottom Line', 'Superstar Wonderful Weirdos', 'Closer Than You Might Believe', 'No Avalon', 'Comfort', 'Gorgeous', 'King of Intimidation', 'Death of Cinderella', 'London' and 'These Are the Thoughts'.