What was Dolly Parton's first film appearance?

Dolly Parton has starred in the following films:

Nine to Five (1980)

The Best Little Whorehouse in Texas (1982)

Rhinestone (1984)

A Smoky Mountain Christmas (1986)

Steel Magnolias (1989)

Wild Texas Wind (1991)

Straight Talk (1992)

The Beverly Hillbillies (1993 - cameo)

Love Can Build a Bridge: The Story of the Judd's (1995 - cameo)

Big Dreams and Broken Hearts: The Dottie West Story (1995 - cameo)

Unlikely Angel (1996)

Get To the Heart: The Barbara Mandrell Story (1997)

Jackie's Back (1999)

Blue Valley Songbird (1999)

Frank McKluski, C.I (2001)

Miss Congeniality 2: Armed and Fabulous (2005 - Guest Appearance)

Joyful Noise (2012)