1980s Rupp left Massachusetts in 1979 to pursue an acting career in New York City. She frequently performed on stage and appeared in commercials before winning her first television role in 1980 as Sheila, a topless dancer, on the daytime drama
All My Children. Earlier the same year, Rupp played Helen, the wife of a cheating husband, in Sharon Tipsword's one-act comedy
Second Verse, produced as part of a play festival at New York's
Nat Horne Theatre. Another notable stage performance was as the young bride Eleanor in the 1985 production of
A. R. Gurney's
The Middle Ages at the Whole Theater Company, established by
Olympia Dukakis in
Montclair, New Jersey. She garnered praise from
Walter Goodman in a
New York Times review of one of her many
off-Broadway performances: as June Yeager, a young wife who feels she is never "loved enough", in the 1986 York Theater Company production of
Arthur Laurents' dramatic play,
The Time of the Cuckoo staged at the
Church of the Heavenly Rest in New York City's
Upper East Side. Rupp's list of stage credits includes appearances in
Terrence McNally's
Frankie and Johnny in the Clair de Lune and
Cynthia Heimel's ''A Girl's Guide to Chaos'', the Broadway role which propelled her career forward. She originated the role of Cynthia in 1986, a character based on Heimel's observations made during her stints as a columnist for
Playboy and
The Village Voice. Directed by
Wynn Handman, and sharing the stage with
Rita Jenrette, Rupp's performance as Cynthia was immortalized by legendary caricaturist
Al Hirschfeld and described in a
New York Times review as "an appealing mixture of pluck and pathos". In his review of
Chaos,
New York Newsday theater critic Allan Wallach called Rupp "a real find". In early 1987, Rupp was featured in an article written by
Enid Nemy for the "Broadway" section of
The New York Times. Entitled "New York is beckoning, but first, Los Angeles", the interview revealed how Rupp's success in the theater so soon after her arrival in New York City had scared the young actress enough to take time off from acting for several years. When she returned to the stage, Rupp explained in the article, she was often cast as an
ingénue; however, after her portrayal of Cynthia in
Chaos, she began getting calls to audition in Los Angeles for "really crazy neurotic" parts in
television pilots. Rupp was realistic about the unpredictability of an acting career and, since she had promised her mother she would never wait tables when she left for New York, she stated that she had not given up her part-time work as a
bookkeeper and was "learning computers" as something to fall back on. Rupp continued to devote herself to acting full-time through the 1980s, and performed in numerous regional stage productions. One such production was
Sherry Kramer's
Wall of Water in
New Haven, Connecticut, at the
Yale Repertory Theatre's Winterfest play festival of 1988. She guest-starred on numerous television shows, including
Kate & Allie,
Spenser for Hire, and
The Days and Nights of Molly Dodd. In 1988, Rupp landed her first feature-film role as Miss Patterson, the timid secretary of
Tom Hanks' Josh Baskin, in the comedy
Big.
1990s In 1990, Rupp returned to New York City to perform in a Broadway stage production of
Cat on a Hot Tin Roof with
Kathleen Turner at the
Eugene O'Neill Theatre. In it, Rupp portrayed Mae (Sister Woman). Her television work during the early 1990s included recurring roles as Ms. Higgins on the television series
Davis Rules with
Randy Quaid, and as Sister Mary Incarnata on
Phenom with
Judith Light, as well as guest roles on
Blossom,
Family Matters,
L.A. Law, and
ER. In 1995, she began her stint as
Jeff Foxworthy's sister-in-law Gayle on
The Jeff Foxworthy Show, appeared in the science fiction miniseries
The Invaders with
Scott Bakula, portrayed
Jerry Seinfeld's annoying booking agent Katie on an episode of
Seinfeld (a role she reprised in 1996), and performed on stage as Meg in
Broken Bones, a dark drama about
spousal abuse by Drew McWeeny and Scott Swan, as part of a one-act play festival at
Hollywood's Met Theater. She provided the voice of Lana Lionheart in the "MGM Sing-Alongs" Videos in 1997. Also in 1997, Rupp appeared as the office manager in the 1997 independent film
Clockwatchers, co-starring Lisa Kudrow, Parker Posey, and Toni Colette. Rupp appeared in several episodes of
Friends as Alice Knight, a
home economics teacher who fell in love with and married Phoebe Buffay's (
Lisa Kudrow) much younger half-brother, Frank Jr. (
Giovanni Ribisi). In 1998, she began portraying
Kitty Forman in the comedy series, ''
That '70s Show. She also portrayed Marilyn See, wife of astronaut Elliot See, in episode 11 of the Emmy Award-winning television miniseries From the Earth to the Moon'', produced by Tom Hanks and directed by
Sally Field.
2000s She lent her voice as the character of Mrs. Helperman in
Disney's animated series ''
Teacher's Pet in 2000, and again for the 2004 movie version. She starred as a stand-up comic with a secret in the independent short film The Act'', directed by Susan Kraker and Pi Ware, an official selection at the
Sundance Film Festival which won several awards at film festivals around the world. In 2004, she played
Brad Hunt's nagging mother in
Lucky 13, a full-length
independent film starring
Lauren Graham. She returned to
All My Children for one episode in December 2005, playing a homeless woman named Victoria. Rupp has often returned to Massachusetts and New York to appear in regional and off-Broadway stage productions. In 2004, she played Dotty Otley in
Michael Frayn's
Noises Off at the Cape Playhouse in
Dennis, Massachusetts. In 2006, she appeared on stage in
Pittsfield, Massachusetts, as a kooky mother in French playwright
Jean Anouilh's comedy
Ring Round the Moon at
Barrington Stage Company. New York theater-goers saw Rupp return to the off-Broadway stage in June 2007 as Valerie in the
Second Stage Theatre production of
Marisa Wegrzyn's
The Butcher of Baraboo, directed by
Judith Ivey. Two months later, she performed in the Berkshire Theatre Festival in
Stockbridge, Massachusetts, as Ida Bolton in a revival of
Paul Osborn's 1939 play, ''
Morning's at Seven''. After ''That '70s Show
ended in 2006, Rupp appeared in a dramatic television role as the wife of a murdered pharmaceutical CEO on the crime drama Law & Order: Special Victims Unit''. In the episode, entitled "Infiltrated", Rupp's character desperately attempts to hide her slain husband's past sexual abuses. In early 2007, the feature film ''
Kickin' It Old Skool'' was released, in which Rupp was cast as
Jamie Kennedy's mother. In 2008, she appeared as a restaurant owner who helps two homeless men in the comedy-drama-musical,
Jackson, written and directed by
J. F. Lawton. In the same year, she returned to daytime television in a guest role on
As the World Turns. Massachusetts theater-goers saw Rupp onstage in 2008 playing Olympia in
Georges Feydeau's 1907 farce
A Flea in Her Ear at the
Williamstown Theatre Festival in
Williamstown, and as Miss Maudie in
To Kill a Mockingbird at the Barrington Stage Company in Pittsfield. In 2012, Rupp portrayed Ruth in
She Wants Me, an independent romantic comedy.
2010s–present In June and July 2012, Rupp starred as Dr.
Ruth Westheimer in
Dr. Ruth – All the Way on the St. Germain Stage of the Barrington Stage Company. The play showcased a sex therapist's life, from fleeing the Nazis in the
Kindertransport and joining the
Haganah in Jerusalem as a scout and sniper, to her struggles to succeed as a single mother coming to America. Rupp reprised the role Off-Broadway in
Becoming Dr. Ruth, for which she was nominated for the 2014
Drama Desk Award for Outstanding Solo Performance. In 2021, Rupp joined the limited television series
WandaVision as Mrs. Hart (aka
Sharon Davis), Wanda and Vision's neighbor, and reprised her role in the spin-off series,
Agatha All Along. ''
That '90s Show, a spin-off from That '70s Show'', saw Rupp return as Kitty Forman. The first series was filmed in 2022 and released in early 2023. ==Personal life==