Sir Patrick Stewart is set to star in the 'Charlie's Angels' reboot.

Sir Patrick Stewart

Sir Patrick Stewart

The 78-year-old actor is said to be in final negotiations about joining Elizabeth Banks' movie, which she will direct, produce and star in alongside Kristen Stewart, Naomi Scott and Ella Balinska, who will portray the titular trio.

According to The Hollywood Reporter, Stewart will play Bosley, who was previously the face of the never-seen owner of detective agency Charlie Townsend.

In a new twist, there will be a number of characters called Bosley, one of which will also be played by Banks, who has penned the movie's script alongside Jay Basu.

The Sony movie - a new take on the popular 70s TV show - will tell the story of the Charlie Townsend Agency, which has now become a security and intelligence service with teams across the globe.

The film will focus on one of those teams with Stewart, Scott and Balinska portraying the three Angels.

Banks will produce the motion picture alongside her husband Max Handelman, as well as Doug Belgrad and Elizabeth Cantillon.

Last month, Stewart revealed she had started boxing to ensure she is in the best possible shape to film the movie.

She said: "I have been boxing a bit, which I have never done. I am so addicted to it. As soon as I have to actually start sparring though, I realise what I am doing is intended to fight people. I am like, it really is assaulting and I really hate it.

"But all I am doing lately is talking to Liz, and can't wait to meet the other girls and I leave on Sunday ... gonna start doing more fight training, getting more aggressive quite soon."

The TV series spawned a 2000 action-comedy film 'Charlie's Angels', which saw Cameron Diaz, Drew Barrymore, and Lucy Liu play the titular trio. They also returned for sequel 'Full Throttle' three years later.

'Charlie's Angels' is expected to be released on September 27, 2019.