Abstract: A folding vehicle bedseat assembly having upper and lower seat cushion portions with corresponding upper and lower frames is disclosed. A preferred folding and support mechanism of the assembly provides for the seat assembly to be moved between an unfolded use configuration and a folded stowage configuration, as well as to be releasably retained in either of such configurations, by way of operation of a single actuation handle. The preferred folding mechanism also allows the seat assembly to be moved to the stowage position without substantially changing the forwardmost projection of the seat assembly.