The present invention provides fully upholstered, ready-to-assemble furniture which may be custom ordered by a purchaser, shipped directly to the home of the purchaser by a parcel delivery service, and then easily and quickly assembled by the purchaser. The ready-to-assemble article of furniture includes a frame having a composite frame member with a long dimension which is formed by a plurality of planar frame members assembled in an end-to-end and overlapping manner. The plurality of planar frame members are interconnected by interlocking protrusions and cutout portions, as well as by threaded fasteners received in push-in connector elements which are held in recesses within the frame members. The interlocking and threaded fastener connections allow a plurality of smaller frame members to form the composite frame member of the furniture frame, wherein the frame has the torsional and longitudinal stability of known furniture frames which include long, single boards. In particular, the interlocking and overlapping structure of the present furniture frame advantageously provides longitudinal and torsional stability to an article of furniture having a long dimension such as an entertainment center or sofa.