She is known for guest appearances or secondary characters in various sitcoms and dramas, as well as a couple of made-for-TV movies. Among her roles are Sally Frame on Another World (1981–1983), Gwendolyn Pierce on Charles in Charge (1984–1985), and replacing Susan Olsen as Cindy Brady in A Very Brady Christmas (1988). Runyon also had a small part inGhostbusters (1984) alongside Bill Murray and she starred in Up the Creek that same year. She was...
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Ghostbusters
As Female Student
Up the Creek
As Heather Merriweather
18 Again!
As Robin Morrison
Carnosaur
As Ann 'Thrush'
A Very Brady Christmas
As Cindy Brady
To All a Goodnight
As Nancy
The In Crowd
As Vicky
Bloodsucka Jones vs. The Creeping Death
As Nurse Zarkov
Tagteam
As Rita Valentine
Cleanin' Up the Town: Remembering Ghostbusters
As Self
Blue De Ville
As J.C. Swift
Master Ninja II
As Alicia Clayton
The Falcon and the Snowman
As Carole
A Man Called Sarge
As Fifi LaRue
Silent Night, Bloody Night 2: Revival
As Carol Brickmann
Flight of the Spruce Goose
As Terry
Dreams of Gold: The Mel Fisher Story
As Angel Fisher
Till Death Us Do Part
As Judy Davis
Killing Streets
As Sandra Ross
Terror Tales
As Melanie (segment "Epidemic")
Murder, She Wrote
As Kelly Barrett
Magnum, P.I.
Who's the Boss?
Beverly Hills, 90210
Quantum Leap
As Peggy Stratton
The Fall Guy
Booker
Dear John
As Karen
The Master
Charles in Charge
As Gwendolyn Pierce
Vinnie & Bobby
As Hillary
Reunited Apart
As Self
The Highwayman
As Amanda Merrick