Wilco's Jeff Tweedy is the latest person in the public eye to enter rehab for prescription painkillers.

The singer/guitarist entered a Chicago treatment center last week, according to his spokesperson. As a result, Wilco's label, Nonesuch, delayed the release of the band's fifth album, A Ghost Is Born, by two weeks to accommodate his recovery. The follow-up to 2002's Yankee Hotel Foxtrot has been rescheduled for a June 22 release.

Tweedy has a history of suffering from migraine headaches. A scene in the 2002 Wilco documentary, "I Am Trying to Break Your Heart," shows Tweedy vomiting after one particularly painful episode.

Although Tweedy was forced to nix a trip to Europe to do press for the album (no performances had been scheduled), Wilco's U.S. dates, which begin April 21 in Columbia, Missouri, are still a go. The eight confirmed dates include a performance in New Orleans during Jazzfest (April 23), the Coachella Valley Music & Arts Festival (May 1), and the Bonnaroo Music Festival (June 11). A European tour scheduled for the summer also remains unaffected. The only set date on that outing is May 28 in Barcelona.

The band recently added guitarist Nels Cline and keyboardist/guitarist Pat Sansone to its touring lineup.

Tweedy's entrance into rehab comes just days after Kelly Osbourne sought treatment for painkiller addiction (see "Kelly Osbourne Checks Into Rehab For Painkiller Addiction").