Loretta Swit, best known for lighting up the screen as the sharp-tongued Maj. Margaret “Hot Lips” Houlihan on M*A*S*H*, has died. She was 87.

Swit passed away shortly after midday on Friday at her residence in New York City, as confirmed by her representative. Although her death is believed to have been due to natural causes, the final confirmation from the coroner’s office is still awaited.

Swit spent over ten years starring in M*A*S*H*, a renowned comedy-drama set during the Korean War, featuring alongside Alan Alda, Jamie Farr, and Larry Linville. She was one of only two original actors — with Alda being the other — who remained with the show for its entire 11-season duration. The show’s monumental 2.5-hour conclusion in 1983 continues to hold the record for being the most-viewed scripted television episode in U.S. history, attracting over 100 million viewers.

Swit infused humor, complexity, and depth into the character of Houlihan — a role that began as a simple antagonist but grew into a representation of strength, sensitivity, and intelligence. Her performance garnered her two Emmy awards, 10 nominations, and four Golden Globe nominations.

Her rep noted that Swit “portrayed the quick-witted Maj. Margaret Houlihan on one of TV’s most honored series and collected a number of awards for the M*A*S*H role, including two Emmys.”

Born Loretta Jane Szwed in Passaic, New Jersey, on November 4, 1937, Swit came from a Polish immigrant family and trained at the American Academy of Dramatic Arts. After honing her skills on stage and in touring productions, she started landing TV guest spots in the late ’60s on shows like Gunsmoke, Mission: Impossible, and Hawaii Five-O. Then came 1972 — and with it, M*A*S*H, her breakout moment.

Swit’s screen career went far beyond the 4077th. She starred in more than 25 TV movies, including the original Cagney and Lacey pilot as Chris Cagney — though she didn’t go on to the series due to her M*A*S*H commitment. Other standout roles included Games Mother Never Taught You, A Killer Among Friends, Hell Hath No Fury, and The Execution.

The stage was another of Swit’s passions. She made her Broadway debut in Same Time, Next Year in 1975, and later starred in over 1,200 performances of Shirley Valentine, a role that earned her the Sarah Siddons Award, “the most prestigious theater award in Chicago,” according to her team.

She even leaned into her musical side with TV specials like The Muppet Show and It’s a Bird, It’s a Plane, It’s Superman, and took on film roles in Freebie and the Bean (with James Caan and Alan Arkin), S.O.B. (with Julie Andrews), Race with the Devil (with Peter Fonda), and Forrest Warrior (with Chuck Norris), among others.

Off-screen, Swit was just as fierce — especially when it came to animals. Her love of wildlife led her to host a Discovery Channel series, Those Incredible Animals, which aired in more than 30 countries. She later founded the SwitHeart Animal Alliance, which her rep described as working “to prevent cruelty and end animal suffering, to promote and cooperate with numerous nonprofit organizations and programs that protect, rescue, train, and care for animals and preserve their habitat.”

She even launched a perfume and coloring book to help raise money for the cause — because when Loretta Swit put her heart into something, she went all in.