Pearl Jam singer Eddie Vedder married his longtime girlfriend, model Jill McCormick, in a Hawaii wedding ceremony on Saturday (Sept. 18), Us Magazine confirms.

Jack Johnson and Sean Penn, who tapped Vedder for his 'Into the Wild' soundtrack in 2007, were among the guests in attendance.

Vedder, who was married once before, shares two daughters with McCormick.

The singer proposed to McCormick last December at the Kennedy Honors tribute to Bruce Springsteen in Washington, D.C.

Vedder and his Pearl Jam bandmates are slated to informally celebrate theirВ  20th birthday at Neil Young's annual Bridge School Benefit, on Oct. 23 and 24 in Mountain View, Ca.