Bon Iver plays a private gig at Riverwest's Mad Planet, in prelude to Bradley Center show

In a warm-up for Saturday night's sold-out concert at the BMO Harris Bradley Center, Bon Iver played a private show Thursday night at the venue where it all began — in Milwaukee, anyway.

Bon Iver, a.k.a. Justin Vernon, performed his first-ever Milwaukee show at the Mad Planet, 533 E. Center St., in January 2008. Thursday night, Vernon performed again at the Riverwest venue, for a private audience.

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According to the Milwaukee music blog Breaking & Entering, Thursday's show was a Milwaukee music reunion of sorts, including a raft of local musicians including Chris Porterfield of Field Report and members of Collections of Colonies of Bees.

Field Report tweeted about the show, too.

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Field Report and Collections of Colonies of Bees are opening Saturday night's Bradley Center show.

Journal Sentinel music writer Piet Levy contributed to this report.