Ex-GUNS N' ROSES drummer Matt Sorum has confirmed that he will not rejoin his former bandmates for tonight's GN'R concert at the Troubadour in West Hollywood, California.

GUNS N' ROSES has still not officially announced the lineup of musicians who will take the stage tonight beyond singer Axl Rose, guitarist Slash and bassist Duff McKagan. But photos taken outside and inside the venues earlier today have revealed that keyboardist Dizzy Reed, guitarist Richard Fortus and drummer Frank Ferrer are all involved.

Asked by a fan on Twitter if he is going to perform with GN'R tonight, Sorum answered simply: "Nope"

Recent reports have suggested that Ferrer, who has been in the GUNS lineup since 2006, will play the bulk of the show at the band's upcoming dates, although "Appetite For Destruction"-era drummer Steven Adler could appear as a special guest.

Sorum, who replaced Steven Adler in GUNS N' ROSES, recorded the highly successful albums "Use Your Illusion I" and "Use Your Illusion II" (both 1991) and "The Spaghetti Incident" (1994). He also supported the group on the "Use Your Illusion" tour and can be heard on GUNS N' ROSES' "Live Era: '87-'93" (1999) and "Greatest Hits" (2004).

Adler last year spoke about how he would feel about a hypothetical reunion of the classic GN'R lineup which would include Matt Sorum on drums instead of him. "Matt wouldn't do it," Adler said . "I see Matt practically every Monday night, and we talked about it. He wouldn't do it unless I was a part of it. And I said, 'Well, dude, I would do it without you.' And he said, 'But you're the original guy. You're the sound of GN'R. I'm not. So it's different.' And I said, 'If I did it, if Axl wanted to play the '[Use Your] Illusion' songs, I would have you right next to me. You come up and I'll either take the throne or sit where I sit.'… Sort of like [the way we did it] at the Rock And Roll Hall Of Fame [induction in 2012]. They didn't show that part on TV, I don't think, but [Matt] played 'Brownstone', and then I came up and played 'Sweet Child' and 'Paradise City'."

Adler continued: "But, yeah, I have nothing against Matt. He didn't do nothing. I had resentments with him, but I talked with him and I worked everything out. Everything. I would love to share a tour bus with him."

Sorum told The Pulse of Radio in a 2009 interview that if the classic GUNS N' ROSES band reunited, they should perform with both him and Adler. "If it's me on drums or Steven or whatever, if it happened, it'd be great, you know. I would actually say to them, 'Hey, bring both of us back,' you know. Let me play the other stuff. We'll have two drum kits. I don't care. If 'Appetite' ('For Destruction', the band's debut) sounds better with Steven playing it, have both guys up there. They can afford it."

GUNS N' ROSES was inducted into the Rock And Roll Hall Of Fame in April 2012. Adler, Sorum, Slash and Duff McKagan attended the ceremony, while Rose and former guitarist Izzy Stradlin stayed home.