Lily James makes a rare appearance with her mother and 'very handsome brothers' at the London Film Festival

Lily James was joined by her mother Ninette Thomson and her two brothers Charlie and Sam as they supported her at the BFI London Film Festival on Monday.

The actress, 37, was there to attend a screening of her new mystery drama, The Liberation, based on the experiences of director Guy Nattiv's grandmother and her involvement in a cult in the 1980s.

Lily stood proudly amongst her family as they posed together on the red carpet, with her mother wrapping an affectionate arm around her waist for the photo.

The Mamma Mia! star looked stylish in a black dress with lace detailing, teamed with a pair of black court shoes and a pair of dazzling drop earrings.

Ninette, who looked stylish in a black jumpsuit and a leather jacket, beamed as she stood with her children at the event.

Captioning a section of photos from the evening, Lily commented on the close bond she had struck up with the cast of the film. 

'Home for a whirlwind trip to the London Film Festival screening of The Liberation with this incredible family (plus my real one, too!) BFI thank you,' she wrote.

Lily went on to comment on her 'handsome' brothers, who were both sporting sharp navy suits and shirts for the occasion and her snooze in a lift. 

She said: 'Ps. I have very handsome brothers & I nearly fell asleep in the lift.'

Sharing a look at her lift nap, Lily posted photos of herself lounging on the floor of Claridge's lift after taking her shoes off. 

Lily stars as a spiritual guru and cult leader named Ricki in the film, which follows middle-aged Holocaust survivor Rita Cooper (played by Carrie Coon).

Rita joins a remote commune led by Lily's character, Ricki, to try to heal her past trauma. Rita's daughters (played by Bella Ramsey and Odessa Young) attempt to track her down and rescue her.

The Liberation is set to be released in January.

The 70th edition of the BFI London Film Festival started on Wednesday and will run through to Sunday, October 18.

Organised by the BFI, the UK's biggest cinematic celebration features 251 film titles from 88 countries alongside red carpet world premieres, immersive media installations and exclusive screen talks. 

Elsewhere during the film festival, Lily cut an elegant figure at The Liberation gala screening at Vue West End on Saturday night.

The actress wowed in a strapless white gown as she joined Bella Ramsey at the premiere.

She elevated her frame in a pair of silver metallic heels and styled her blonde locks poker straight. 

Lily's appearance comes after she revealed she was 'beyond burned out' and 'losing the joy' before taking a break from acting to go on a 'solo trip of a lifetime'.

She has starred in back-to-back films including Cinderella, Mamma Mia! Here We Go Again, Pride and Prejudice, Baby Driver and more since she was 21.

And to reset, Lily headed on an eight-month-long adventure in Cambodia where she 'recharged' and 'found a new source of inspiration'.

Speaking to Flaunt magazine, she said: 'I've worked pretty consistently since I was 21, and I was beginning to just feel so even beyond burned out. I was scared I was losing the joy and losing that kind of fire.

'I really had to be honest with myself. I've had an incredible time [going on] different kinds of adventures, owning my time, and taking the reins back of my life.'

She added: 'You have to recharge. I think going from one job to the next, not only was I feeling like I wasn't recharging or finding new sources of inspiration, but also blink, and you've missed a year.'