Cheryl Ruth Hines was born on September 21, 1965, in Miami Beach, Florida, and grew up primarily in Tallahassee. Her journey toward Hollywood was anything but direct. Before acting became her profession, she worked a variety of jobs and gradually pursued an interest in performing that eventually led her west. She studied theater and television production and later trained with the Groundlings, the celebrated Los Angeles improvisational and sketch-comedy company whose alumni include some of America's best-known comedy performers. That improvisational background would prove particularly useful when Hines encountered a television series where memorizing pages of dialogue was largely beside the point.

Before her breakthrough, Hines accumulated the familiar collection of small television appearances that help working actors pay bills while hoping somebody eventually gives them a role with a character name that lasts longer than one episode. She appeared on programs including Swamp Thing, Unsolved Mysteries, Suddenly Susan and Friends. There was little indication that she was about to land a part that would define a major portion of her career, particularly because the program itself was unlike most television comedies then being produced.

That program was HBO's Curb Your Enthusiasm, created by Seinfeld co-creator Larry David. The series grew out of the 1999 special Larry David: Curb Your Enthusiasm and developed into a comedy centered upon a fictionalized version of David navigating everyday life while possessing an almost supernatural ability to turn minor annoyances into diplomatic incidents. The production used detailed story outlines rather than conventional scripts, leaving performers to improvise much of their dialogue. The Television Academy has described the process as one in which performers worked from plot outlines while improvising the dialogue, making quick thinking and careful listening essential parts of every scene.

Hines was cast as Cheryl David, Larry's fictional wife. She was relatively unknown when she auditioned, which actually worked in the show's favor because audiences would not arrive with expectations about who she was supposed to be. More importantly, she possessed the improvisational skills necessary to work opposite David. Cheryl could not simply wait for a scripted punchline because there often wasn't one. She had to listen, react and help construct the scene while remaining believable as a woman who had presumably agreed at some point to share her life with this extraordinary collection of grievances wearing trousers.

The role demanded an unusually restrained kind of comedy. Larry David's character was frequently the source of the chaos, Jeff Garlin's Jeff Greene enthusiastically contributed to it, and Susie Essman's Susie Greene could unleash volcanic fury when required. Cheryl often occupied a different position. She was the person standing nearby watching events deteriorate while attempting to maintain some connection with normal human behavior. A glance, pause or weary response from Hines could be funnier than an elaborate joke because the audience understood precisely what Cheryl was thinking: Larry had done it again.

That dynamic helped make Cheryl David an essential part of the early seasons. She wasn't merely the sensible wife inserted to react to the eccentric husband. Hines gave Cheryl her own wit, boundaries and increasing unwillingness to indulge Larry's behavior. The comedy depended upon her being strong enough to challenge him rather than simply tolerate him. When Larry became obsessed with restaurant etiquette, social customs, tipping, seating arrangements, clothing, gifts, conversations or some microscopic violation of an unwritten rule, Cheryl frequently became the audience's representative, trying to determine why any reasonable adult would devote this much energy to something so trivial.

Of course, "reasonable adult" and Curb Your Enthusiasm have never maintained particularly close relations.

The show's improvisational structure also made the performances feel unusually natural. Characters interrupted one another, repeated themselves, searched for words and reacted in ways that resembled actual conversation rather than polished sitcom dialogue. Hines became particularly adept at this style because she understood that reacting was every bit as important as speaking. Comedy sometimes works hardest when the performer appears to be doing almost nothing, and Hines could turn listening to one of Larry's increasingly desperate explanations into an entire performance.

Her work was recognized by the Television Academy with nominations for Outstanding Supporting Actress in a Comedy Series in both 2003 and 2006. Those nominations placed her alongside performers from some of the era's biggest television comedies and demonstrated how successfully a largely improvised performance could compete in a medium traditionally built around carefully scripted dialogue.

As Curb Your Enthusiasm developed, the fictional marriage changed as well. Cheryl eventually separated from Larry, giving Hines an opportunity to move her character beyond the original husband-and-wife structure. Yet she remained part of the series and Larry's world. Their relationship became another source of comedy precisely because the history between the characters never disappeared. Divorce might alter a marriage, but in the universe of Curb Your Enthusiasm, apparently nothing can protect a person completely from another discussion about whether somebody behaved correctly at dinner.

Hines also expanded her career beyond Curb. Her film appearances included Along Came Polly, Herbie: Fully Loaded, RV, Keeping Up with the Steins, Waitress, The Grand and The Ugly Truth. The roles allowed her to move between broad comedy and more grounded character work, often using the approachable quality that had made Cheryl David so effective. Rather than overwhelming scenes, Hines frequently played characters whose humor emerged from recognizable reactions to increasingly peculiar people around them.

One particularly memorable film role came in RV, the 2006 family comedy starring Robin Williams. Hines played Jamie Munro, whose husband secretly turns what is supposed to be a family vacation into a business-related road trip. The resulting journey involves an enormous recreational vehicle, family tensions and the sort of mechanical and sanitary disasters that tend to occur in movies involving inexperienced people operating very large vehicles. Working opposite Williams placed Hines alongside one of comedy's most energetic improvisers, an environment for which her own improvisational training made her unusually well prepared.

She also appeared in Adrienne Shelly's 2007 film Waitress, starring Keri Russell. Hines played Becky, one of the waitresses working alongside Russell's Jenna at a small-town diner. The film mixed humor with considerably more serious themes involving unhappy relationships, friendship and the possibility of starting over. Hines's performance helped provide warmth and humor without disrupting the emotional balance of the story, demonstrating again that her comedy worked particularly well when grounded in believable characters.

Hines subsequently moved behind the camera. She made her feature-film directing debut with Serious Moonlight, starring Meg Ryan and Timothy Hutton. The dark comedy, written by the late Adrienne Shelly, involved a woman who discovers that her husband intends to leave her and responds by holding him captive until they can repair their marriage. It is not a strategy generally recommended by marriage counselors, but it does provide considerably more material for a movie than calmly discussing matters over coffee.

Television remained an important part of Hines's career. She starred opposite Megan Mullally in the short-lived ABC comedy In the Motherhood and later played Dallas Royce in ABC's Suburgatory. Dallas was very different from Cheryl David: wealthy, glamorous, image-conscious and living in an affluent suburban environment that the series cheerfully exaggerated. Hines embraced the broader character while retaining the timing and instinct for reactions that had served her so well on Curb.

She also appeared in programs including The Crazy Ones, Son of Zorn and 3Below: Tales of Arcadia, while continuing to take film and television roles across comedy and voice acting. Her career demonstrated the versatility available to performers whose foundation is improvisation. Learning to respond honestly within a scene rather than merely deliver predetermined dialogue can translate remarkably well across different styles of comedy.

Yet Curb Your Enthusiasm remained the role most closely associated with Hines. The series ultimately became one of HBO's longest-running comedies, accumulating dozens of Emmy nominations during its run. Cheryl's presence was particularly important because Larry David's fictional world needed people capable of resisting him. Without characters willing to tell Larry that he was being ridiculous, his behavior would simply exist in a vacuum. Hines provided resistance without turning Cheryl into a humorless authority figure. She could challenge him, laugh at him, become furious with him and occasionally agree with him — which was perhaps the most dangerous possibility of all.

The character also offered an excellent example of how a television spouse could avoid becoming merely an accessory to the protagonist. Cheryl had friends, opinions and limits. As the series progressed, those limits became increasingly significant. The fictional relationship evolved because Cheryl eventually reached conclusions about Larry that viewers had been contemplating for years. There are only so many arguments about tipping, restaurant seating and acceptable social behavior that one marriage can reasonably be expected to survive.

Hines's ability to hold her own in improvised scenes alongside Larry David, Jeff Garlin, Susie Essman and an extraordinary succession of guest stars remains central to her contribution to the series. Improvisational comedy can look deceptively easy because successful performers make spontaneous dialogue appear natural. In reality, it requires discipline. Actors must remain in character, remember the purpose of the scene, listen closely, introduce useful ideas and recognize when another performer has offered something worth pursuing. They must also resist the understandable temptation to laugh when Larry David begins explaining why everyone else in the room has misunderstood a perfectly obvious social rule that exists primarily inside Larry David's head.

Cheryl Hines built her career around precisely that ability to make comedy look effortless. Whether playing the patient Cheryl David, an eccentric suburban socialite, a mother caught in family chaos or one member of an ensemble, she has consistently relied upon timing rather than volume. Her performances rarely need to announce that something funny is happening. Often, the expression on her face has already done the work.

And that may be the perfect legacy of her years on Curb Your Enthusiasm. Larry David could spend several minutes constructing an elaborate defense of something indefensible. Cheryl Hines could listen, wait until he had finished, look at him for approximately two seconds — and win the scene.