If you were watching Odd Squad and found yourself curious about the actress playing “Ms. O / The Big O,” or if you saw her in Wonder or Good Boys and wondered, “Who is that?” — that’s Millie Davis. She’s a Canadian actress born in 2006, and her career already spans film, television, and voice work. What makes her story compelling is not just the number of credits she has already, but her ability to shift between different kinds of roles (on-camera, voice, guest, main roles) while still growing.
This article will cover her background, a full look at her films and TV shows, voice acting work, awards and recognition, and what she’s planning next. I’ll also include interesting facts, interview insights, and takeaways for aspiring actors. Let’s dive in.
2. Biography & Early Life
Millie Davis was born on December 6, 2006 in Toronto, Ontario, Canada. Her parents, Megan and Wayne Davis, run a theatre troupe in Thornhill, Ontario. Her older brother, Drew Davis (born 2003), is also an actor.
What’s striking is how early Millie entered the acting world. At just six months old, she appeared in a TV commercial (for “Run for the Cure”) alongside her father. Her first line of dialogue on screen came before she had turned four, in a television film called Befriend and Betray. Having exposure so early is rare, and it meant she basically grew up in front of the camera.
Her family’s involvement in theatre likely gave her a foundation in performance, confidence, and understanding how to work with audiences. Over time, she moved into TV and voice acting, gradually building a broad portfolio.
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3. Film Roles / Movie Career
Though Millie does a lot of television and voice work, her film roles are also significant. Below are some of her key films and her contributions to them.
The Best Man Holiday (2013)
One of her earlier film credits, Millie played Hope. This role helped establish her presence in feature films at a young age.
Odd Squad: The Movie (2016)
While Odd Squad is fundamentally a TV series, it also had a movie adaptation in which she reprised her role as Ms. O. Because she was already so associated with the character in the series, transitioning to a movie allowed her to deepen that role on a bigger screen.
Wonder (2017)
In Wonder, Millie Davis appears as Summer Dawson. This was a high-profile film with a wide audience, which brought her more visibility.
Good Boys (2019)
In the comedy Good Boys, she played Brixlee. It’s a different genre from what you might typically expect of a child actor coming from educational TV, which shows her versatility.
Lamya’s Poem (2021)
This is a voice role: she voices Lamya.
A Dark Truth (2012)
One of her earliest film credits before she was widely recognized, in which she played Saber Francis.
She also appears in short or experimental works like CCF’s Solstice Stories.
Each of these films helps chart her growth: small roles evolving into more meaningful ones, from cameo to supporting parts to voice work.
Reception & Significance
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The Best Man Holiday gave her early visibility in a film ensemble.
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Wonder is a film that deals with deep emotional themes, so being part of it allowed her to show she can handle serious material.
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Good Boys shows she can do humor and more mainstream Hollywood fare.
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Voice roles like Lamya’s Poem show how she is trusted even in roles where the performance has to carry without a physical presence.
For a young actress, that mix is powerful—it shows casting directors she can handle a lot of different demands.
4. Television & Streaming Roles
Television has been a foundational part of Millie’s career. Many people know her best through her TV work.
Odd Squad (2014–2022)
This is one of her signature roles. She plays Ms. O / Big O, one of the lead characters, and remained in the show across multiple seasons. Because her character evolved over time (from Ms. O to Big O), the role let her show consistency and growth.
She also appears in Odd Squad: World Turned Odd (TV movie) and other spinoffs.
Orphan Black (2013–2017)
She played Gemma Hendrix in multiple episodes. Orphan Black was a more adult, dramatic series, which meant she sometimes took on darker and more complex scenes. That’s a good contrast to her child-friendly roles.
The Parker Andersons / Amelia Parker (2021)
Millie plays Amelia Parker, one of the main characters. Transitioning into more adolescent and teen roles, she’s able to show maturity and carry more weight in the storylines.
The Umbrella Academy (2024)
She plays Claire Hargreeves in 6 episodes of Season 4. This role is part of a major, globally popular series, which broadens her exposure to a larger and more mainstream audience.
Guest / Episodic Appearances
She has had guest roles in shows like See, Origin, Detention Adventure, Shelved, Pinkalicious & Peterrific, Galapagos X, etc. These smaller roles help her remain flexible and versatile.
Streaming and New Media
She is credited with appearances in more recent streaming projects. For example, Galapagos X (voice) is among her roles.
Her television work is not just about volume—it’s about range. She can move from children’s shows to adult dramas, from live action to voice work, and take guest spots or main roles. That flexibility is a strength.
5. Voice Acting & Animation Credits
Because Millie is young, a lot of her work has been in voice acting, which offers different challenges and opportunities.
What is voice acting?
It’s acting through vocal performance rather than physical presence. The actor must evoke emotion, character, and nuance using voice alone, often without a co-actor in the room, and sometimes without seeing visual references.
Here are key voice roles she has done:
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Doozers (voice of Daisy Wheel)
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Annedroids (voice of PAL)
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Wishenpoof! (voice of Penelope)
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Esme & Roy (voice of Esme)
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Little People (voice of Mia)
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Additional smaller voice roles: Super Why!, Corn & Peg, Xavier Riddle and the Secret Museum, Pinkalicious & Peterrific
These voice roles allow her to remain active even when she isn’t on camera, and help broaden her appeal to audiences in animation and children’s programming.
An advantage of voice work is that the actor isn’t limited by age or appearance in the same way as on-camera roles. Millie can lend her voice to characters of different ages, species, or stylistic types.
6. Awards, Recognition & Milestones
Millie Davis has received recognition over the years, especially in Canadian entertainment circles.
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She was nominated for a Canadian Screen Award for Best Performance by an Actress in a Leading Role in a Dramatic Program or Limited Series for her role as Ms. O in Odd Squad: The Movie.
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With the Odd Squad cast, she has been co-nominated several times, and they have won awards like Best Young Ensemble in a TV Series at the Joey Awards.
These accolades help validate her talent and give her professional credibility. They also help casting directors see that she’s already been recognized by peers.
A milestone worth noting: being the only original cast member still on Odd Squad by season three. That marks her consistency and reliability.
Another is her transition to more mature roles (e.g. in The Umbrella Academy) as she ages. That shift is a critical phase for any child actor: whether they get typecast or break out into new territory.
7. Upcoming & Future Projects
As of the most recent data, Millie has projects in progress or announced that show where she might be heading next.
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Hearts Around the Table: Josh’s Third Serving and Hearts Around the Table: Kiki’s Fourth Ingredient are among her recent credits.
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Dino Dex also appears as a credit for 2025 in her TV listings.
Given her age and trajectory, I expect she might move into more mainstream teen / young adult roles, possibly in streaming series or films. Her ability to do voice work also gives her flexibility to balance multiple projects.
Fans and industry watchers should keep an eye on interviews and announcements, because she may branch into producing, writing, or more mature acting territory as many young actors do.
8. Challenges, Growth & Personal Insights
No career path is without its challenges, especially for someone growing up in the public eye.
Balancing School & Acting
Millie has spoken in interviews about the “trial and error” of balancing her schooling with acting assignments. She said that even though it was hard, she believes the benefits outweigh the challenges, and that it taught her discipline.
That balancing act is a familiar story for child & teen actors. They need to maintain stability, emotional support, and education while working unpredictable schedules.
Typecasting & Transitioning Roles
Child actors often get stuck playing certain kinds of roles (cute kid, voice for cartoons, etc.). The risk is being pigeonholed. Millie’s pivot into teen and young adult roles (like The Umbrella Academy) shows she’s fighting against that typecasting.
Growth in Range
She’s gradually taken more serious or adult material (e.g. Orphan Black, The Umbrella Academy) which suggests she’s growing her emotional range. That’s vital if she wants a long career.
Advice / Insights for Others
From what I gathered, she emphasizes persistence, learning, and taking challenging roles. For aspiring actors, that means being open to smaller parts, voice roles, guest spots, etc., rather than expecting instant stardom.
I also think one point many budding actors forget: having a strong support system (family, mentors) is essential. Millie’s theatre family background likely gave her stability and understanding.
9. Trivia, Fun Facts & Lesser-Known Credits
Here are some interesting tidbits you might enjoy:
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Her first on-screen appearance was at six months old.
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She and her brother Drew have appeared together in Orphan Black, Befriend and Betray, and A Dark Truth.
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In Odd Squad, she was the only original cast member still on the show by season 3.
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She has done voice work for shows intended for young kids and preschool audiences—this expands her reach across age groups.
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Because voice roles often allow more flexibility, she may have had periods where she was more active in voice work while slowing down live action roles.
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She has done guest voice roles in Xavier Riddle and the Secret Museum, Pinkalicious & Peterrific, Corn & Peg, etc.
Those little facts help humanize her and give fans more points of connection.
10. Conclusion
Millie Davis’s career is already rich and varied despite her young age. She has moved fluidly between film, television, and voice acting. She has roles in children’s programming as well as more mature shows, which suggests she’s not limiting herself. She’s won recognition, navigated challenges, and continues to take on diverse projects.
To me, what stands out most is her willingness to try different kinds of roles—voice, guest star, main cast—and to push into more mature roles as she grows. If she continues down this path, she could become a fixture in both family programming and mainstream entertainment.
For fans, industry watchers, or aspiring actors, her journey is one to watch. She’s a reminder that versatility, hard work, and smart choices can help someone evolve over time rather than get stuck.
FAQ
Q: How old is Millie Davis?
A: She was born December 6, 2006, so as of 2025 she is 18 years old.
Q: What was Millie Davis’s first role?
A: Her first on-screen appearance was a commercial as an infant, but her first line in acting was in Befriend and Betray (a TV film).
Q: What are Millie Davis’s most famous roles?
A: She is well known for Odd Squad (Ms. O / Big O), Orphan Black (Gemma Hendrix), Wonder (Summer Dawson), Good Boys (Brixlee), and voice work in Esme & Roy.
Q: Has Millie Davis won any awards?
A: She has been nominated for a Canadian Screen Award and has won ensemble / youth awards (like from the Joey Awards) via Odd Squad.
Q: What upcoming projects does Millie Davis have?
A: Some upcoming or recent credits include Hearts Around the Table: Josh’s Third Serving, Hearts Around the Table: Kiki’s Fourth Ingredient, Dino Dex, and her ongoing TV work.
