A knit form-fit cover for a recliner chair having a base, a backrest, a seat, a pair of armrests and a footrest. The cover includes panels for covering the backrest, left and right armrests, the seat and the footrest. A seat panel includes a fastener having ends attached to lateral edges of the seat panel for positioning near a front edge of the seat of the recliner chair, which may be engaged to resistively fix a portion of the seat panel at the front edge of the seat. The seat panel is formed from an elasticized yarn material, and has pleated corners at lateral ends of a front edge of the seat panel for further securing the seat panel to the footrest. The seat panel also preferably has loops affixed to rear corners of the seat panel for securing a rear portion of the seat panel to the seat.