A trim panel assembly includes a first trim panel and a second trim panel. The first trim panel has an attachment portion, and the second trim panel has an attachment portion that cooperates with the attachment portion of the first trim panel to connect the first and second trim panels together to provide a trim panel assembly that allows relatively sliding movement between the first and second trim panels. The first trim panel can have a single attachment portion that extends continuously throughout the length thereof, while the second trim panel can have a plurality of discrete portions that extends along the length thereof, or vice versa. The attachment portion of the second trim panel can be molded either about or within the attachment portion of the first trim panel.