Strike a pose! Lena Dunham shows off a slimmed-down figure at Girls season premiere, after falling in love with the workout created by Gwyneth Paltrow's friend and trainer Tracy Anderson

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Lena Dunham has become a devotee of Tracy Anderson's workout method, and it seems like all of her hard work is paying off.

For Thursday night's final premiere of her hit HBO show Girls, the 30-year-old showed off her toned arms in a black halter top featuring metal detail and paired it with a matching metallic skirt that hugged her slimmed down frame. 

Lena, who frequently films nude scenes for the show, is a strong advocate for body positivity, and she started working out with Tracy a few years ago as a way to manage her anxiety. 

Feeling confident: Lena Dunahm showed off her slimmed down physique at Thursday night's final premiere of her hit HBO show Girls

Making changes: Lena has fall in love with trainer Tracy Anderson's workout method. She is pictured on the red carpet on Thursday and with the trainer in 2015 

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Lenda Dunham channeled her inner super model as she attended the final premiere of her hit HBO show Girls.

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Close as can be: Tracy, 41, posed for a photo with Lena and Girls showrunner Jenni Konner at the premiere 

The creator and executive producer paired her futuristic look with a high ponytail and dramatic hot pink eye shadow, although the rest of her make-up was minimal. 

Lena took some time to pose with the rest of the cast on the red carpet, including Allison Williams, Zosia Mamet and Jemima Kirke, who all showed off their personal styles with their choice of outfits. 

Although she is never one to shy away from showing off her figure, the actress looked happy and confident as she posed with her hand on her hip during the red carpet appearance. 

In some images, she turned to the side and looked over her shoulder at the cameras, while others see her cuddled up with her longtime boyfriend Jack Antonoff. 

Interesting choice: Lena chose to go bold with bright pink eye shadow thickly layered around her eyes at the premiere

Strike a pose: Lena confidently posed with her hand on her hip at the event (left). She is pictured running errands in 2015 (right) 

Lena also took a moment to strike a pose with Tracy, who was invited to the premiere.  

She also showed off her physique in a crop top and calf-length skirt on Wednesday at the TimesTalks: A Final Farewell to the Cast of 'Girls' event. 

And while she looks amazing, Lena's desire to make working out a regular part of her routine had nothing to do with losing weight or changing the shape of her body.  

Lena spoke candidly about her newfound love of fitness and her workouts with Tracy during a 2015 ESPN interview in which she said the trainer's method is her 'main form of exercise'. 

Robot chic? The creator and executive producer chose a metallic number for her futuristic look, which she paired with a high ponytail

Having a blast: Lena took some time to pose with the rest of the cast on the red carpet, including Allison Williams, Zosia Mamet and Jemima Kirke (from left to right)

'It's a mix of aerobics, strength training and something that kind of resembles Pilates but that she created on her own,' she explained. 

'What I like about it is that Tracy really listens to your body and what you're capable of. There's no weird pressure. It's honestly like if one day I have a UTI and I can't jump up and down, she'll say, "OK, we'll adjust." 

'With Tracy it's not about getting everyone to look a specific way. It's about getting everyone to feel strong. And she uses the word "connected" a lot, which I really love. I love the idea of feeling connected.'  

Lena also gave Tracy, 41, a big shout out on Instagram in 2015 when she shared a photo of herself in leggings and a sports bra before a workout.    

Hint of skin: Lena flaunted her waist in a crop top on Wednesday at the TimesTalks: A Final Farewell to the Cast of 'Girls' event (left). She also wore a crop top to a wedding in 2015 (right)

Spreading self-love: Lena is a strong advocate for body positivity, and she proudly shows off her body on social media (left) and her show Girls (right)

'Promised myself I would not let exercise be the first thing to go by the wayside when I got busy with Girls Season 5 and here is why: it has helped with my anxiety in ways I never dreamed possible,' she explained. 

'To those struggling with anxiety, OCD, depression: I know it's mad annoying when people tell you to exercise, and it took me about 16 medicated years to listen. I'm glad I did. It ain't about the ass, it's about the brain,' she continued. 

'Thank you @tracyandersonmethod for showing me the light (and @bandierfit is where I bought my Florida mom inspired workout look.) #notsponsored #stillmedicated. 

Fitness guru: Tracy found fame after her exercise program attracted the likes of Madonna and Gwyneth almost a decade ago

Mental health: Lena gave Tracy a big shout out on Instagram in 2015 when she shared a photo of herself in leggings and a sports bra, explaining that the workouts help her anxiety

The actress posted also posted photo of herself in an ill-fitting bra and leggings when she forgot her own clothes for a workout 

A few weeks later, she proved her dedication by snapping a photo of herself wearing an ill-fitting bra and size small pants that she had to borrow when she was running late to one of Tracy's classes and forgot her workout clothes.  

Tracy found fame after her fitness method attracted the likes of Madonna and Gwyneth almost a decade ago.

The mother-of-two, who maintains that women should never lift more than three pound weights, promises that her workout regimen will give women the streamlined physique that they desire because unlike other programs, hers focuses on accessory muscles rather than major muscle groups.

Tracy has a following of numerous A-list stars, including Jennifer Lopez, Kim Kardashian, and Nicole Richie, and while she and Madonna parted ways in 2009, their are plenty of celebrities who continue to gush about the pint-sized blonde trainer.