In 1994, Bonham Carter and Kenneth Branagh met while filming Mary Shelley's Frankenstein.
They began an affair while Branagh was still married to Emma Thompson, whom he had met in 1987 while filming the BBC Series Fortunes of War and married in 1989.
At the time, Thompson's career was soaring, while Branagh was struggling to make a success of his first big-budget film (Mary Shelley's Frankenstein).
Following his affair with Bonham Carter, Branagh and Thompson divorced in 1995.
However, in 1999, after five years together, Bonham Carter and Branagh also separated.

Thompson has gone on to have "no hard feelings" towards Bonham Carter, calling the past "blood under the bridge."
She explained, "You can't hold on to anything like that.
It's pointless.
I haven't got the energy for it.
Helena and I made our peace years and years ago.
She's a wonderful woman."
Thompson, Branagh, and Bonham Carter all later went on to appear in the Harry Potter series, albeit in different films.

In 2001, Bonham Carter began a relationship with American director Tim Burton, whom she met while filming Planet of the Apes.
Burton subsequently took to casting her in his films, including Big Fish, Corpse Bride, Charlie and the Chocolate Factory, Sweeney Todd: The Demon Barber of Fleet Street, Alice in Wonderland and Dark Shadows.
After their separation, Bonham Carter mentioned, "It might be easier to work together without being together any more.
He always only cast me with great embarrassment."

Bonham Carter and Burton lived in adjoining houses in Belsize Park, London.
Bonham Carter owned one of the houses; Burton later bought the other and they connected the two.
In 2006, they bought the Mill House in Sutton Courtenay.
It was previously leased by her grandmother, Violet Bonham Carter, and owned by her great-grandfather H. H. Asquith.

Bonham Carter and Burton have two children together: son Billy Raymond Burton and daughter Nell Burton.
Bonham Carter has stated that her daughter Nell is named after all the "Helens" in her family.
Bonham Carter told The Daily Telegraph of her struggles with infertility and the difficulties she had during her pregnancies.
She noted that before the conception of her daughter, she and Burton had been trying for a baby for two years and although they conceived naturally, they were considering in vitro fertilisation.

On 23 December 2014, Bonham Carter and Burton announced that they had "separated amicably" earlier that year.
Of the separation, Bonham Carter told Harper's Bazaar: "Everyone always says you have to be strong and have a stiff upper lip, but it's okay to be fragile.... You've got to take very small steps, and sometimes you won't know where to go next because you've lost yourself."
She added: "With divorce, you go through massive grief—it is a death of a relationship, so it's utterly bewildering.
Your identity, everything, changes."

It was reported that Bonham Carter and Norwegian author Rye Dag Holmboe first met at a wedding in the summer of 2018 and began a relationship that October.
The couple have kept their relationship very private and made their first red carpet appearance together in October 2019.
In 1994, Bonham Carter and Kenneth Branagh met while filming Mary Shelley's Frankenstein. They began an affair while Branagh was still married to Emma Thompson, whom he had met in 1987 while filming the BBC Series Fortunes of War and married in 1989. At the time, Thompson's career was soaring, while Branagh was struggling to make a success of his first big-budget film (Mary Shelley's Frankenstein). Following his affair with Bonham Carter, Branagh and Thompson divorced in 1995. However, in 1999, after five years together, Bonham Carter and Branagh also separated.
Thompson has gone on to have "no hard feelings" towards Bonham Carter, calling the past "blood under the bridge." She explained, "You can't hold on to anything like that. It's pointless. I haven't got the energy for it. Helena and I made our peace years and years ago. She's a wonderful woman." Thompson, Branagh, and Bonham Carter all later went on to appear in the Harry Potter series, albeit in different films.
In 2001, Bonham Carter began a relationship with American director Tim Burton, whom she met while filming Planet of the Apes. Burton subsequently took to casting her in his films, including Big Fish, Corpse Bride, Charlie and the Chocolate Factory, Sweeney Todd: The Demon Barber of Fleet Street, Alice in Wonderland and Dark Shadows. After their separation, Bonham Carter mentioned, "It might be easier to work together without being together any more. He always only cast me with great embarrassment."
Bonham Carter and Burton lived in adjoining houses in Belsize Park, London. Bonham Carter owned one of the houses; Burton later bought the other and they connected the two. In 2006, they bought the Mill House in Sutton Courtenay. It was previously leased by her grandmother, Violet Bonham Carter, and owned by her great-grandfather H. H. Asquith.
Bonham Carter and Burton have two children together: son Billy Raymond Burton and daughter Nell Burton. Bonham Carter has stated that her daughter Nell is named after all the "Helens" in her family. Bonham Carter told The Daily Telegraph of her struggles with infertility and the difficulties she had during her pregnancies. She noted that before the conception of her daughter, she and Burton had been trying for a baby for two years and although they conceived naturally, they were considering in vitro fertilisation.
On 23 December 2014, Bonham Carter and Burton announced that they had "separated amicably" earlier that year. Of the separation, Bonham Carter told Harper's Bazaar: "Everyone always says you have to be strong and have a stiff upper lip, but it's okay to be fragile.... You've got to take very small steps, and sometimes you won't know where to go next because you've lost yourself." She added: "With divorce, you go through massive grief—it is a death of a relationship, so it's utterly bewildering. Your identity, everything, changes."
It was reported that Bonham Carter and Norwegian author Rye Dag Holmboe first met at a wedding in the summer of 2018 and began a relationship that October. The couple have kept their relationship very private and made their first red carpet appearance together in October 2019.
Helena Bonham Carter