This week’s “My Mother’s Wedding” stars Kristin Scott Thomas alongside Scarlett Johansson, Sienna Miller and Emily Beecham in a semi-autobiographical mother-daughter story that also serves as this British Dame’s directing debut.

The film begins on the eve of the third wedding for the twice-widowed Diana (Scott Thomas) who must combat her three daughters’ resistance to her impending nuptials.  Diana’s first husband, the father of the girls, was a Royal Navy air pilot who died in a flying accident when they were young. She married his best friend, also a Royal Navy air pilot, who also died in a flying accident.

In reality, Scott Thomas was five when her Royal Navy pilot father Simon Scott Thomas died in a flying accident. When she was 12 her stepfather Simon Idiens, also a Royal Navy air pilot, died in a flying accident.

That history prompted “My Mother’s Wedding,” Scott Thomas, 65, acknowledged in a virtual interview. She dedicates the film to her two fathers.

“As an actor I’ve been doing this for a very long time and it just felt like I was grown up enough now to be able to tell a story from a wider point of view.

“This particular story was something I felt was used by other people so much. I mean, every time there’s a profile about me, there’s a little paragraph about ‘my tragic childhood.’

“And I wanted to reclaim that and say, ‘You can have a tragic childhood but it doesn’t define you.’ So we built this story of these three women and this mother. We built that around my experiences, of the trauma I suffered as a child. So it’s very personal.

“Well,” she clarified, “it’s very possible in that regard, in that it’s the memories that the character that Scarlett plays are actually my memories. I sort of gave them to the film, to the project, and the rest of it we built kind of an imagined life around these around these stories.”

Scott Thomas is experiencing another career breakthrough, co-starring opposite Gary Oldman and Jack Lowden with the AppleTV+ MI-6 hit series “Slow Horses,” which launches its fifth season in September and is already renewed for seasons 6 and 7.

“It’s always a surprise to have a hit. It’s always lovely when it happens,” she said. “And I’m particularly proud to be in this show, because it’s such a great show and I love watching it. It’s very prestigious. It’s incredibly well made. It’s incredibly well formed. It’s funny, it’s clever. It’s brilliant!

“This is the first time I’ve ever done long-form TV, so I wasn’t really prepared for the years and years of it. But I mean, something of such high quality. Who’s to complain?”

“My Mother’s Wedding” is in theaters Aug. 8.

Scarlett Johansson, from left, Emily Beecham and Sienna Miller in a scene from “My Mother’s Wedding.” (Vertical Entertainment via AP)