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 ).