> At a Glance
> – Mary Elizabeth Ellis told News Of Los Angeles she “would love” husband Charlie Day to appear on A Man on the Inside
> – The couple have co-starred on It’s Always Sunny in Philadelphia since 2005
> – Day previously said he wants a cameo if the show gets a third season
> – Why it matters: Fans could see the real-life spouses share the screen on Netflix after nearly two decades together on FX
Mary Elizabeth Ellis is ready to add another project to the list of on-screen collaborations with husband Charlie Day. The 46-year-old actress, currently starring in Netflix’s A Man on the Inside, says working with Day remains a priority.
A Familiar Partnership
Ellis and Day have been married since 2006 and have appeared together on It’s Always Sunny in Philadelphia since 2005. They also co-starred in the 2008 film A Quiet Little Marriage, which Ellis co-wrote.
When asked by News Of Los Angeles about bringing Day onto her Netflix series, Ellis didn’t hesitate:
> “I love working with him and would love to have him there.”
The couple’s creative partnership extends beyond acting. Ellis revealed they have multiple projects in development:
- Day is writing a film they plan to shoot together
- Ellis wrote a film she hopes to feature Day in
- They continue working together on It’s Always Sunny
“He’s my favorite person,” Ellis added.
The Secret to Their On-Screen Chemistry
What makes them effective scene partners? Ellis credits mutual respect and communication.
> “I think we both just respect each other and listen to each other. We bounce ideas off each other, honestly, to the point where sometimes I’m like, ‘I need to brush my teeth before you start giving me thoughts on your films.'”

Day previously expressed his desire to join the Netflix series during a July interview with News Of Los Angeles, saying:
> “I would love to be on her show, but I know they just wrapped their second season. I’ll have to keep my fingers crossed for a third.”
About A Man on the Inside
The series premiered its second season on November 20. The show follows Ted Danson as Charles Nieuwendyk, who goes undercover as a college professor to help crack a case. Ellis plays Charles’ daughter, Emily.
Ellis described her character’s evolution:
> “Season 1 was really about her taking care of her dad. He lost his partner that he had been with forever, and she was really concerned that her dad lost himself in that. In season 2, she starts to look at herself a little bit more in her own grief, like what she’s going through, and so I get to work on healing myself a little bit more in the season.”
The ensemble cast includes Mary Steenburgen, Stephanie Beatriz, Michaela Conlin, Lisa Gilroy, Madison Hu, Sam Huntington, Jason Mantzoukas, Constance Marie, Linda Park, David Strathairn and Jill Talley.
Key Takeaways
- Ellis actively wants Day to guest star on A Man on the Inside
- The couple have multiple collaborative projects in development
- Day has publicly expressed interest in a cameo appearance
- The Netflix series recently premiered its second season
- Their nearly 20-year creative partnership shows no signs of slowing
With A Man on the Inside potentially heading into a third season, fans might finally see this real-life couple share the Netflix screen.

