After years of delay, Led Zeppelin have finally made their music available for streaming. The band's catalog will be rolled out exclusively to subscribers of the Spotify service.

In an announcement made in New York by Spotify CEO Daniel Ek, the availability of the band's music will be staggered over the next few days.:

This news leaves AC/DC and the Beatles as the two biggest acts in rock that have yet to make their music available on Spofity, although Paul McCartney's solo work can be streamed. Terms of the Led Zeppelin deal were not disclosed.

Launched in 2006, Spotify has yet to make a profit, posting losses of $60 million in 2011 and $77 million in 2012. The company has come under fire since its 2011 American launch for its poor royalty rates paid out to artists, which are believed to be approximately $0.004 per stream. Still, Spotify is estimated to be worth more than $4 billion.