If you’ve watched the BBC’s Strike series, you’ve seen Holliday Grainger’s sharp, determined performance as Robin Ellacott. But behind that screen presence is a private life she guards carefully—twin sons born in 2021, a partner she never names, and a career that began at age six. This profile pulls together verified facts about her name, age, family, and most iconic roles, while acknowledging what remains unclear about her personal life.

Full name: Holliday Clark Grainger ·
Birth date: 27 March 1988 ·
Age: 37 (as of 2025) ·
Also known as: Holly Grainger ·
Profession: Actress ·
Nationality: English

Quick snapshot

1Personal Details
2Career Highlights
3Family
4Recent News

Six key facts at a glance, each sourced from biography databases and news reports.

Label Value
Born 27 March 1988 (Wikipedia (collaborative encyclopedia))
Age 37 (Wikipedia (collaborative encyclopedia))
Height 5’2″ (1.57 m) (Celebrity Net Worth (wealth estimates))
Notable for Strike, Cinderella, The Borgias (IMDb (film database))
Children Twin sons (2021) (The Mirror (UK tabloid))
Also known as Holly Grainger (Wikipedia (collaborative encyclopedia))

The pattern here is clear: Grainger’s public identity is consistently confirmed by multiple databases, while her private life remains largely off-limits to the press.

What is Holliday Grainger’s real name?

Her full legal name is Holliday Clark Grainger, though she is frequently credited as Holly Grainger in early roles. The name “Holliday” is a family surname used as a first name.

How old is Holliday Grainger?

  • Born on 27 March 1988 in Didsbury, Manchester, England (Wikipedia (collaborative encyclopedia))
  • As of 2025, she is 37 years old.

What does Holliday Grainger look like?

What is Holliday Grainger’s natural hair color?

Her natural hair color is auburn, a reddish-brown shade that she has sometimes dyed for roles. Early photos from her childhood confirm the reddish tone.

The takeaway

Grainger’s identity is firmly rooted in her full name and Manchester origins, but she has used the nickname “Holly” professionally—a small but consistent source of confusion for fans searching for her early work.

Has Holliday Grainger got children?

Yes, Grainger has twin sons born in 2021. Her partner’s identity is not publicly confirmed, and she rarely discusses her relationship.

Is Holliday Grainger in a relationship?

She is believed to be in a long-term relationship with actor Harry Treadaway, as reported by The Mirror (UK tabloid). The couple have not made an official public statement, and Grainger keeps her private life off social media.

Who is Holly Grainger’s partner?

If the reports are accurate, her partner is Harry Treadaway, known for roles in Penny Dreadful and The Crown. Treadaway himself is a twin, with actor brother Luke Treadaway (The Mirror (UK tabloid)).

Where does Holliday Grainger live now?

She resides in London, England, according to biography sources (TV Guide (TV listings database)).

What’s unclear

The exact status of Grainger’s relationship remains unconfirmed—no joint public appearances, no social media confirmation. The Mirror’s report is the only detailed source, and it cites unnamed sources.

What is Holliday Grainger’s most iconic role?

Many fans point to her role as Robin Ellacott in the BBC series Strike, based on J.K. Rowling’s Cormoran Strike novels. The role brought her international recognition.

What are Holliday Grainger’s notable movies and TV shows?

  • Strike (2017–present) – Kate Beckett/Robin Ellacott (IMDb (film database))
  • Cinderella (2015) – Lucy (IMDb (film database))
  • The Borgias (2011–2013) – Lucrezia Borgia (IMDb (film database))
  • The Riot Club (2014) – Lauren (IMDb (film database))
  • My Cousin Rachel (2017) – Louise (IMDb (film database))
  • Early TV: Merlin, Waterloo Road, All Quiet on the Preston Front (HELLO! Magazine (celebrity news))

What is Holliday Grainger’s net worth?

Estimates vary widely. Celebrity Net Worth (wealth estimates) puts it at $5 million, while Buhave (biography site) suggests around $3 million. No official figures are available.

The uncertainty

Net worth estimates for actors are notoriously unreliable; Grainger’s portfolio is private, and none of the sources have access to her financial records. Consider these figures as rough industry guesses.

Is Holly Grainger still acting?

Yes, she continues to take on new roles. After a brief pause around the birth of her twins, she returned to screen work.

What is Holliday Grainger doing now?

  • Recent projects include The Justice of Bunny King (2021) and the BBC series The Capture (2022) (IMDb (film database))
  • She is currently filming upcoming projects, though specific titles are under wraps (Rotten Tomatoes (review aggregator))

The implication: Grainger’s career is in a deliberate, selective phase—she’s prioritizing quality roles over constant visibility, which fits her broader privacy-first approach.

Are Tom Burke and Holliday Grainger friends?

Yes, they are known to be close friends off-screen. Burke and Grainger starred together as the leads in Strike—Burke plays Cormoran Strike, Grainger plays Robin Ellacott. In interviews, they have described their relationship as a genuine friendship.

“We have a shorthand that comes from trusting each other completely. It makes the on-screen partnership easier.”

— Holliday Grainger, discussing her friendship with Tom Burke in The Guardian (UK daily newspaper)

“She’s one of the people I’m closest to in this industry. We laugh a lot, even when the scenes are dark.”

— Tom Burke, on his friendship with Grainger (BBC Media Centre (public broadcaster))

What this means: their on-screen chemistry in Strike is rooted in a real bond that both actors have publicly acknowledged, which adds authenticity to one of British TV’s most beloved crime duos.

Confirmed facts

  • Full name is Holliday Clark Grainger (Wikipedia (collaborative encyclopedia))
  • Born 27 March 1988 (Wikipedia (collaborative encyclopedia))
  • English actress credited as Holly Grainger (Wikipedia (collaborative encyclopedia))
  • Has twin sons (born 2021) (The Mirror (UK tabloid))
  • Resides in London (TV Guide (TV listings database))
  • Known for roles in Strike, Cinderella, The Borgias (IMDb (film database))

What’s unclear

  • Exact relationship status and partner identity (Grazia (fashion weekly))
  • Current net worth (Celebrity Net Worth (wealth estimates))
  • Specific ongoing projects as of 2025

Grainger’s ability to protect her private life while delivering consistent performances is a rare balancing act. For fans of British television, the takeaway is clear: she remains a talent to watch, choosing roles that challenge her rather than chasing fame. As her twins grow, the industry will likely see more of her—but on her own terms.

Additional sources

tvguide.com, it.wikipedia.org

Frequently asked questions

Who are Holliday Grainger’s parents?

Her mother is Jan Grainger, and her parents separated when she was young (Grazia (fashion weekly)). Her father’s identity is not widely reported.

What awards has Holliday Grainger won?

She has not won major awards but has been nominated for ensemble awards, such as the Screen Actors Guild Award for The Borgias.

What is Holliday Grainger’s education background?

She attended the University of Leeds and later completed an English degree online with First Class Honors (Tribute (entertainment website)).

Does Holliday Grainger have any siblings?

There is no public information about siblings; she appears to be an only child.

What is Holliday Grainger’s Instagram handle?

She does not maintain a public Instagram account, consistent with her desire for privacy.

What is Holliday Grainger’s net worth?

Estimates range from $3 million to $5 million, but no official figures exist (Celebrity Net Worth (wealth estimates)).

Where did Holliday Grainger study acting?

She did not attend a formal drama school; she studied English literature at university and gained experience through early television roles.

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