1974–2009: Career beginnings and success with horror films Richards began her acting career at age five in 1974, portraying Julia Faulker in a single-episode appearance in the television series
Police Woman. She later appeared in 18 episodes of
NBC's
Western historical drama television series
Little House on the Prairie as Alicia Sanderson Edwards. Her sister
Kim Richards, also an actress, appeared in one episode of
Little House on the Prairie the season before Kyle joined the cast. The sisters later played on-screen sisters in the 1977 thriller film
The Car. Throughout the 1970s, Richards continued to appear on several television series, such as
Flying High,
Vega$,
Fantasy Island,
Time Express and
Carter Country. Richards portrayed Lindsey Wallace in the
slasher film Halloween (1978) alongside
Jamie Lee Curtis.
Halloween became a widely influential film within the horror genre; it was largely responsible for the popularization of slasher films in the 1980s and helped develop the slasher genre. The film grossed $70 million at the worldwide box office and subsequently expanded into a
Halloween franchise with thirteen sequel films. Following the success of
Halloween, Richards portrayed Ellie Curtis in the
Disney supernatural
horror film The Watcher in the Woods (1980) alongside
Bette Davis. She also had a main role as teenager Lissy Preston in the fantasy sitcom
Down to Earth (1984–1987), which ran for seven seasons. Subsequent roles included nurse Dori Kerns in 21 episodes of
NBC's
medical drama series
ER (1998–2006) and Lisa, a supporting character in the comedy film ''
National Lampoon's Pledge This! (2006) starring her niece Paris Hilton. She also had guest roles in several television shows, including C.S.I., 7th Heaven, City Guys, Beverly Hills, 90210, Love Boat: The Next Wave, and CHiPs''. Richards joined the series with her sister,
Kim Richards. Richards's other sister,
Kathy Hilton, made recurring cameo appearances before joining in an official capacity as a friend of Richards in
season 11. Richards's personal life and relationships with her sisters are a focal point for the series. In 2012, she was featured on the cover of
The Hollywood Reporter along with other cast members from
The Real Housewives franchise, including
Vicki Gunvalson,
Ramona Singer,
Caroline Manzo and
NeNe Leakes. Richards was nominated for "Reality Star of 2019" award at the
2019 People's Choice Awards. While starring on
The Real Housewives of Beverly Hills, Richards continued acting. She played Tricia in
Lifetime's television film
Deadly Sibling Rivalry (2011) and Housewife Heather in the
comedy film The Hungover Games (2014). In 2013, she portrayed modeling agent Casey McGraw in three episodes of
NBC's soap opera
Days of Our Lives. In 2017, Richards appeared as a contestant on
The New Celebrity Apprentice and earned $25,000 for her charity of choice,
Children's Hospital Los Angeles. She was the 5th contestant fired, finishing in 12th place. Richards co-executive produced
Paramount Network's comedy television series
American Woman (2018), which was inspired by her childhood in the 1970s. The series was cancelled after one season due to declining ratings. On August 30, 2019, it was confirmed that Richards would reprise the role of
Lindsey Wallace, the role she originated in the original 1978 film, in
Halloween Kills. Following a year delay due to the
COVID-19 pandemic,
Halloween Kills had its world premiere at the
78th Venice International Film Festival on September 8, 2021 and was theatrically released in the United States on October 15, 2021 by
Universal Pictures. The film made $4.85 million from Thursday night previews, the highest for both an R-rated title and a horror film amid the pandemic. The film has grossed a total of $131 million at the worldwide box office and stands as one of the year's highest grossing horror movies behind
A Quiet Place Part II. Richards was confirmed to return for the 2021 sequel,
Halloween Ends, after her performance in
Halloween Kills attracted positive reactions from fans. In August 2021, Richards started filming the
Christmas movie
The Real Housewives of the North Pole alongside actress
Betsy Brandt. The film, which aired on
Peacock on December 9, 2021 features a variety of cameos from fellow cast members of
The Real Housewives franchise, including
Sonja Morgan,
Karen Huger,
Cynthia Bailey, and
Lisa Barlow. Richards, a Christmas enthusiast, called filming for the movie a "dream come true." Richards starred in
The Real Housewives Ultimate Girls Trip, a
spin-off featuring various women from
The Real Housewives franchise, that premiered on November 16, 2021, on
Peacock. Richards was the only representative from the
Beverly Hills series, joining Bailey and
Kenya Moore from the
Atlanta series,
Teresa Giudice and
Melissa Gorga from the
New Jersey series, and
Luann de Lesseps and
Ramona Singer from the
New York series.
2022–present: Continued acting roles In 2022, Richards was nominated for the second time in the category "The Reality TV Star of 2022" at the
People's Choice Awards, alongside
The Real Housewives of Beverly Hills costar
Garcelle Beauvais. Richards was one of the women included on
Variety's "40 Most Powerful Women on Reality TV in 2023" list, with the magazine writing: "Richards has kept her head held high, and has become a household name, after having been a child actor. She's even resumed acting, having returned to the
Halloween films she was featured in as a kid." In October 2024, Richards was chosen as one of
Us Weekly's Reality Star of the Year. On April 3, 2023, Richards was announced as part of the cast of the
Christmas romance film
The Holiday Exchange alongside
Rick Cosnett and
Taylor Frey. The film, which was an
LGBTQ reimaginging of the 2006 movie
The Holiday, features Richards in the role of overly involved mother Lola. The film premiered on October 1, 2024 on streaming services
Amazon Prime Video and
Peacock. She played also Vivian Hayes in the romantic comedy film
Beautiful Wedding (2024), released in limited theaters on January 24, 2024. At 2024
Emmy Awards red carpet, actress
Reese Witherspoon teased an upcoming project with an unnamed
Real Housewife who she had recently sat beside on a plane. Richards identified herself as the mystery housewife and revealed that she was working with Witherspoon's company
Hello Sunshine. == Business ventures ==