Brian Patrick Sundelius was born April 7, 1971 at 6:30 PM. in Kalispell to John and Marilyn Sundelius. He arrived three weeks late and entered the world protesting loudly! His lungs worked just fine!! And that is how he lived his life; passionately! Brian passed away June 20, 2018, at his home in Montana City. He will be forever missed and if you knew Brian you will remember him for whatever special way in which he touched your life! He is survived by his wife Teresa, his children Chelsea, Gabriel and Teagan, his parents John Sundelius and Marilyn Lyons-Pogue (David) his brother Wayne and nephew Donovan, his father-in-law George Bradley and mother-in-law Judy Bittikofer (Tom), aunt Patty Ordish (Gary), uncle Steven Lyons (Jennifer), uncle Gene Lozaw (Karen), step siblings Sean, Kristin, Courtney, Cassie, Chelsea and Colby, and numerous cousins. He was preceded in death by both sets of Grandparents. Please join us for a celebration of Brian's life in Billings on Friday, July 13 at 1 p.m., at Smith Downtown Funeral Chapel, 925 South 27th. Street. Reception to follow.