United Kingdom, Oct. 14 -- Patricia Arquette says Diane Keaton "had no pretenses".

The 57-year-old actress worked with the late film star - who died over the weekend aged 79 - on made-for-TV film Wildflower in 1991, having already been directed by Keaton in a 1990 episode of CBS Schoolbreak Special.

She told PEOPLE magazine: "She was just so immediate, and so alive and so generous, such an incredible vision for beauty and design and photography and art, and the arts and music..

"She was just so effervescent and so alive, and no pretenses, and very much her own person.

"We have very few original artists, like, real original people."

The Severance star also praised Keaton's "incredible" catalogue of movies, and revealed she even skippe...