United Kingdom, June 28 -- Uma Thurman received a "beautiful e-letter" from Charlize Theron before joining the Old Guard 2 cast.

The 55-year-old actress stars alongside Charlize, 49, in the new superhero film, and Uma has revealed how she came to join the project.

Speaking to Extra, Uma shared: "[Charlize] sent me a beautiful e-letter and I read the script, and the first Old Guard was awesome."

Uma was also drawn to the idea of filming more action scenes.

The Kill Bill star said: "I was like, 'Oh, I would be kind of picking up a little bit of my old trope,' and it caught my fancy. I was like, 'I think it's time. I'm gonna go support her and have a big old battle.'"

Charlize relished working with Uma, revealing that she "fell off [her...