Johnny and Matthew Gaudreau‘s sister finally made it official with her man … getting married months after her brothers were killed the night before her wedding.

Katie Gaudreau and her high school sweetheart, Devin Joyce, got married at a Philadelphia church Friday and enjoyed a 200-person reception at a hotel in the area afterward.

Of course, two major people in Katie’s life couldn’t attend … her bros who died in a car accident just before her wedding was supposed to go down in August 2024.

Katie told People about navigating the planning of this second ceremony amid her grief … and, she says that — on her wedding day — she holds “both the sorrow of their absence and the beauty of their presence. Their love didn’t leave.”

KG’s anxiety certainly wasn’t helped by the crash last year, it seems … telling the outlet part of the reason she wanted to have the reception in a hotel is because she didn’t want to worry about something happening to people as they left.

Remember … Johnny and Matthew were hit by a truck while riding bikes down a New Jersey highway in the evening before the crash.

The man accused of hitting them — Sean Higgins — allegedly told cops at the scene he had five or six beers that night. Higgins pled not guilty to criminal charges earlier this year.