Laura Louie and Woody Harrelson

Woody Harrelson and his girlfriend of 20 years, Laura Louie, made it official over the weekend in a Hawaii wedding.

The two, who met on the set of Cheers, were married Sunday in Maui in an intimate ceremony attended by family and friends, Us Weekly reports.

Also on the guest list were Owen Wilson, Willie Nelson, Sean Penn and Alanis Morissette, who performed at the ceremony.

Harrelson and Louie are parents to three daughters, Deni Montana, 15, Zoe Giordano, 12, and Makani Ravello, 2.