Charlie Day and actress Mary Elizabeth Ellis have built one of Hollywood’s more unusual long-running relationships. Married since 2006, the couple have spent much of their careers working in the same entertainment world, including a famous on-screen pairing in It’s Always Sunny in Philadelphia.
For viewers of the FXX comedy, Ellis is instantly recognizable as The Waitress, the woman Charlie Kelly has obsessively pursued for years. Off camera, however, Day and Ellis are husband and wife and parents to one son.
Their relationship began years before Sunny became a television institution, giving the pair a shared history that stretches back more than two decades.
How They Met
Day and Ellis met in December 2001 while both were involved in the New York theater scene.
They began dating soon afterward, at a time when neither had reached the level of mainstream recognition that would later come with It’s Always Sunny in Philadelphia.
Their relationship developed alongside their professional lives, with both actors continuing to pursue opportunities in television, film and theater.
That early connection eventually became a marriage, but the couple’s working relationship would also become an important part of their story.
Their Marriage
Charlie Day and Mary Elizabeth Ellis married on March 4, 2006.
The wedding took place before It’s Always Sunny in Philadelphia had become one of the longest-running comedy series on American television. Day was already working on the show, which had debuted in 2005, but its extraordinary longevity was still impossible to predict.
Nearly two decades later, their marriage has continued while both have maintained separate acting careers as well as occasional projects together.
The couple have generally kept their private life relatively low-key compared with the publicity surrounding their television work.
The Waitress
Ellis became a familiar face to Sunny viewers through her role as The Waitress.
Her character is the longtime target of Charlie Kelly’s unwanted romantic attention. Charlie repeatedly attempts to win her over, while The Waitress generally rejects him and becomes increasingly frustrated by his behavior.
The joke works partly because Day and Ellis are married in real life.
Their off-screen relationship creates a striking contrast with the dysfunctional dynamic between their characters. Rather than romantic chemistry, the show uses their real-life connection to create an intentionally uncomfortable comedy storyline.
Ellis has appeared throughout the series’ long run, making The Waitress one of its most recognizable recurring characters.
Their First Collaboration
Day and Ellis were working together before Sunny established their best-known pairing.
In 2004, the two appeared as twin siblings on Reno 911!. The role allowed them to share the screen before Ellis became permanently associated with The Waitress.
Their professional collaborations have continued beyond television.
The pair appeared together in the 2022 romantic comedy I Want You Back, giving audiences another opportunity to see them working together in a setting completely different from Sunny.
Their Son
Day and Ellis have one child together, a son named Russell Wallace Day.
Russell was born in December 2011, five years after his parents married.
The couple have been protective of their son’s privacy and have generally avoided turning his life into a major part of their public image.
For Day, becoming a father came while It’s Always Sunny was establishing itself as a major part of his career. He has occasionally discussed fatherhood in interviews, but the family’s everyday life remains largely outside the entertainment spotlight.
Life Beyond Sunny
While Charlie Day is best known as Charlie Kelly, his career extends far beyond the FXX series.
He has appeared in major films including Horrible Bosses, Pacific Rim, The Lego Movie and I Love You, Daddy. He has also provided voice work and taken on producing and writing responsibilities.
Ellis has likewise developed a career separate from her role as The Waitress. Her credits include television and film work, allowing her to establish an identity beyond the character most associated with her.
That independence has helped the couple maintain careers that overlap without making either person’s professional identity entirely dependent on the other.
Working Together
Working with a spouse can be complicated, particularly when the characters involved have such an unusual relationship.
Day and Ellis have nevertheless managed to make their professional collaborations part of their careers without allowing their real marriage to become the central story.
On Sunny, Charlie’s obsession with The Waitress has continued as one of the show’s recurring comic threads. Ellis has played the character with a combination of irritation, sarcasm and occasional vulnerability that keeps the storyline from becoming completely one-dimensional.
The contrast between their characters and real lives remains one of the show’s more entertaining behind-the-scenes details.
Fool’s Paradise
Day also expanded his creative role by writing and directing Fool’s Paradise, his feature directorial debut.
The 2023 comedy starred Day as a mute man who unexpectedly becomes a Hollywood celebrity after being mistaken for an actor. The project demonstrated his ambitions beyond performing as Charlie Kelly.
Ellis has continued pursuing her own acting work while supporting a family life that has remained considerably more private than Day’s professional persona.
Charlie Day and Mary Elizabeth Ellis have now been together for more than two decades, having first met in New York’s theater community in 2001.
Their marriage began in 2006, and their son joined the family in 2011.
For millions of viewers, Ellis and Day are best known as The Waitress and Charlie Kelly, two characters whose relationship is deliberately chaotic and one-sided. Behind the scenes, their story could hardly be more different.
They met before either became a household name, married as Day’s signature series was beginning its run and continued building individual careers while raising their son.
That combination of marriage, family and occasional professional collaboration has made their relationship one of the more distinctive partnerships connected to It’s Always Sunny in Philadelphia.
