'I'm that fitness girl!' Tallulah Willis looks trim in a skimpy sports bra and leggings after another workout

She's been working on her fitness with regular gym trips.

And Tallulah Willis showed off the results of her hard work on Tuesday as she donned a bra top and leggings for another workout in Beverly Hills.

The 22-year-old star was clearly proud of how she looked as she shared a snap from her outing on Instagram along with the caption: 'hey i'm that fitness girl'

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Bikini ready: Tallulah Willis looked fantastic in her stylish gym gear on Tuesday as she headed for another workout session in Beverly Hills

Bikini ready: Tallulah Willis looked fantastic in her stylish gym gear on Tuesday as she headed for another workout session in Beverly Hills

The redheaded beauty displayed her tiny waist in a stylish sports bra with mesh detail and cropped leggings.

She wore half her bobbed locks in a messy ponytail and covered her eyes with some chic sunglasses. 

The daughter of Demi Moore and Bruce Willis tucked a white t-shirt into her waist, which she didn't need during the outing as temperatures soared in southern California.

Looking trim: The 22-year-old star donned a sports bra with mesh panels and cropped leggings

Looking trim: The 22-year-old star donned a sports bra with mesh panels and cropped leggings

That's her name! Tallulah wore customized flip-flops emblazoned with her online nickname Buuski

That's her name! Tallulah wore customized flip-flops emblazoned with her online nickname Buuski

Refueling: The actress stopped by EARTH Bar in West Hollywood for some refreshment
Refueling: The actress stopped by EARTH Bar in West Hollywood for some refreshment

Refueling: The actress stopped by EARTH Bar in West Hollywood for some refreshment 

Meanwhile, Tallulah celebrated her 22nd birthday last week with a party at a karaoke bar with friends and her mom Demi.

She shared a video clip to Instagram showing her belting out Britney Spears' ...Baby One More Time.

And in another social media snap she gave her 53-year-old mother a hug and wrapped her leg around the G.I. Jane actress.

On the go: The redhead wore half her locks in a messy ponytail and donned stylish sunglasses

On the go: The redhead wore half her locks in a messy ponytail and donned stylish sunglasses

���� hey im that fitness girl ����

A photo posted by tallulah (Youthful Slimelord) (@buuski) on

She wrote alongside the photo: 'thanks for holding me in your body for 9 months bb'

Tallulah is one of three daughters Demi and Bruce, who were married from 1987-2000, share together.

She also has sister Rumer, 27 and Scout, 24.

Bruce, 60, is married to model Emma Heming, 37.

Feeling sentimental: Tallulah celebrated her birthday last week at a karaoke bar and captioned this snap of her hugging mother Demi: 'thanks for holding me in your body for 9 months bb'

Feeling sentimental: Tallulah celebrated her birthday last week at a karaoke bar and captioned this snap of her hugging mother Demi: 'thanks for holding me in your body for 9 months bb'

Edgy: The daughter of Demi Moore and Bruce Willis was rocking a buzz cut in late 2014

Edgy: The daughter of Demi Moore and Bruce Willis was rocking a buzz cut in late 2014

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