Lily Allen shows off her lithe frame in a sports bra and leggings as she works out in the gym

Lily Allen shows off her lithe frame in a sports bra and skin-tight leggings as she works out in the gym before West End performance in 2:22 A Ghost Story

She hit back at skinny-shamers in July saying people have ‘never seen me sober, not smoking and exercising every day’, after receiving a number of comments expressing concerns about her weight.

And, on Monday afternoon, Lily Allen showed off her lithe frame in a sports bra and skin-tight leggings as she worked out in the gym, ahead of her performance in 2:22 A Ghost Story, in London’s West End.

The Smile hitmaker, 36, took to her Instagram Stories to share a video of herself enduring a grueling weighted exercise session while clad in the tiny burgundy top and khaki bottoms. 

Workout time! On Monday afternoon, Lily Allen, 36, showed off her lithe frame in a sports bra and skin-tight leggings as she worked out in the gym

Holding onto a weighted bar, Lily could be seen leaning forward while lifting one leg in the air behind her. 

On Friday, Lily once again shared an insight into her workout regime on Instagram, squeezing in a gym session and taking to her social media platform to document it. 

The singer showed off her slender physique in a green crop top and black leggings which she teamed with white trainers as she worked up a sweat.  

Lily burnt off the calories with lunges before moving on to work on her upper body strength with pull ups.     

Feel the burn: Holding onto a weighted bar, Lily could be seen leaning forward while lifting one leg in the air behind her

 Feel the burn: Holding onto a weighted bar, Lily could be seen leaning forward while lifting one leg in the air behind her

Toning up: The Smile hitmaker took to her Instagram Stories to share a video of herself enduring a grueling weighted exercise session while clad in the tiny top and khaki bottoms

Toning up: The Smile hitmaker took to her Instagram Stories to share a video of herself enduring a grueling weighted exercise session while clad in the tiny top and khaki bottoms

Later in the day, a beaming Lily left the Noel Coward Theatre theatre after another successful performance of 2:22 A Ghost Story. 

The LDN hitmaker showed off her sense of style in a polo neck knitted jumper which was cropped, teasing a glimpse of her toned waist.  

Lily appeared in high spirits as she stopped to sign autographs who had waited patiently at the stage door to meet her. 

Busy: Lily once again shared an insight into her workout regime on Instagram on Friday

Busy: Lily once again shared an insight into her workout regime on Instagram on Friday

Impressive: Lily showed off her slender physique in a green crop top and black leggings which she teamed with white trainers as she worked up a sweat

Workout: Lily burnt off the calories with lunges before moving on to work on her upper body strength with pull ups

Impressive: Lily showed off her slender physique in a green crop top and black leggings which she teamed with white trainers as she worked up a sweat

Lily’s production, which opened at Noel Coward Theatre on August 3, received high praise from critics who praised the ‘macabre playfulness’ of the production and Allen’s stellar stage presence.

Lily plays the character Jenny in the supernatural thriller about four friends caught up in a night of high tension.

She is joined on stage by former EastEnders star Jake Wood, City Of Angels actor Hadley Fraser and Julia Chan of Silent House.  

Strong: The singer, who is starring in 2:22 A Ghost Story, managed to squeeze in a gym session and took to her social media platform to document it

Strong: The singer, who is starring in 2:22 A Ghost Story, managed to squeeze in a gym session and took to her social media platform to document it

Read more at DailyMail.co.uk