Ronny Hallin

Ronny Hallin is an American television producer and actress. She is best known for her work on the television shows Happy Days, Mork & Mindy, and Step by Step.

Early life
She is the sister of Penny Marshall and Garry Marshall.

As producer

 * Blansky's Beauties (1976–1979)
 * Happy Days (1977–1984)
 * Mork & Mindy (1978–1982)
 * Laverne & Shirley (1979)
 * Joanie Loves Chachi (1981–1983)
 * You Again? (1985–1987)
 * Valerie (1985–1991)
 * Nothing in Common (1986–1987)
 * Family Matters (1989–1990)
 * Perfect Strangers (1989–1992)
 * Going Places (1990–1991)
 * Step by Step (1991–1992)

As actress

 * The Odd Couple (1974)
 * Laverne & Shirley (1982)

As actress

 * Herndon (1982)
 * Frankie and Johnny (1991)
 * Exit to Eden (1994)
 * Raising Helen (2004)