Dolly Parton is an American country singer, songwriter and actress. She has appeared in twelve theatrically released films and has made over 400 appearances on television. Parton's first televised appearance was in 1956 on the Cas Walker Farm and Home Hour when she was 10 years old; she had previously appeared on Cas Walker's radio show. Her major television breakthrough came in 1967 when she was discovered by Porter Wagoner who had her join his weekly variety show, The Porter Wagoner Show. Parton appeared on 218 episodes of the show between 1967 and 1975 as a regular performer. Appearing on the show with Wagoner during this time is credited with helping to boost Parton to superstardom.