Slender Lena Dunham showcases her incredible weight loss in workout gear... as she delightedly Facetimes health buff Gwyneth Paltrow at Tracy Anderson's NYC studio launch

She recently attributed her weight loss to Donald Trump's presidency - citing 'soul-crushing pain and devastation and hopelessness' in helping her slim down. 

And Lena Dunham proved the Trump diet is working a treat as she showcased her incredibly slimline new frame at the opening of mentor Tracy Anderson's studio in New York on Wednesday.

The Girls star, 30, looked thrilled to be flaunting her firmer form as she hammed it up with aplomb on the red carpet, at one point showing off her mobile phone after receiving a video call from fellow Anderson disciple Gwyneth Paltrow.

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Phone a friend: Tracy's most famous disciple Gwyneth Paltrow put in an appearance via video

Phone a friend: Tracy's most famous disciple Gwyneth Paltrow put in an appearance via video

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When she was recently quizzed over her weight loss, Lena revealed: 'Donald Trump became president and I stopped being able to eat food. 

'Everyone's been asking like: "What have you been doing?" And I'm like: "Try soul-crushing pain and devastation and hopelessness and you, too, will lose weight".' 

Lena looks sensational in a slogan vest paired with bold multi-coloured leggings, which slotted in perfectly with her famously kooky style. 

Far from simply flaunting figure on the red carpet, she also used technology to enjoy some company with superstar guest Gwyneth. 

Skinny Girl:  The slimline physique Lena Dunham showcased in New York on Wednesday is a far cry from her famously curvy figure she displayed on the set of Girls in 2015
Skinny Girl:  The slimline physique Lena Dunham showcased in New York on Wednesday is a far cry from her famously curvy figure she displayed on the set of Girls in 2015

Skinny Girl:  The slimline physique Lena Dunham showcased in New York on Wednesday is a far cry from her famously curvy figure she displayed on the set of Girls in 2015

Kiss goodbye: Far from simply flaunting figure on the red carpet, she also used technology to enjoy some company with superstar guest Gwyneth

Kiss goodbye: Far from simply flaunting figure on the red carpet, she also used technology to enjoy some company with superstar guest Gwyneth

A serving of Goop: As one of Tracy's most staunch followers, the blonde beauty looked stunning as she delightedly chatted to the audiences and Lena

A serving of Goop: As one of Tracy's most staunch followers, the blonde beauty looked stunning as she delightedly chatted to the audiences and Lena

As one of Tracy's most staunch followers, the blonde beauty looked stunning as she delightedly chatted to the audiences and Lena.  

Lena was joined by a host of big names, including model Hilary Rhoda, DJ Hannah Bronfman, chef Alexandra Guarnaschelli and, of course, Tracy Anderson herself.

Lena has claimed she has did not become dedicated to exercise as she wanted to lose weight or change the shape of her body.

Mentor: She was paying tribute to her fitness guru Tracy Anderson at the opening of her new studio in the Big Apple

Mentor: She was paying tribute to her fitness guru Tracy Anderson at the opening of her new studio in the Big Apple

Beach bod buddies: Lena and Tracy were pictured together in August 2015

Beach bod buddies: Lena and Tracy were pictured together in August 2015

Speaking about her newfound love of fitness and her workouts with Tracy in 2015, she said Tracy Anderson's method is her 'main form of exercise'.

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

'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.' 

Body of evidence: The small screen stunner is walking proof of the benefits of exercise

Body of evidence: The small screen stunner is walking proof of the benefits of exercise

Put it away love: '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.'

Put it away love: '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.'

Tracy found fame after her fitness method attracted celebrity disciples such as Madonna and Gwyneth Paltrow almost a decade ago.

The mother-of-two, who makes the claim that women should never lift weights heavier than three pounds, insists her workout regimen gives women a streamlined physique because her programs focus on 'accessory' muscles rather than major muscle groups.

However many of her claims have not been backed by experts.

Fine fillies: Model Hilary Rhoda and DJ Hannah Bronfman trotted down to the event
Fine fillies: Model Hilary Rhoda and DJ Hannah Bronfman trotted down to the event

Fine fillies: Model Hilary Rhoda and DJ Hannah Bronfman trotted down to the event

Confounding the critics: Tracy is going from strength-to-strength despite the AMA saying it sometimes looks like she is 'making up the moves as she goes along'

Confounding the critics: Tracy is going from strength-to-strength despite the AMA saying it sometimes looks like she is 'making up the moves as she goes along'

An American Running Association paper said: 'There is nothing to suggest that her exercises actually work only the "accessory muscles," or what she means by that term. (The accessory muscles do exist; they are used in respiration.)

'But Tracy never lists these muscles by name. Even more shaky is the claim that targeting these muscles will cause them to "pull in" the larger muscles around them.'

It later added: 'To watch Tracy on her infomercial, you get the sense that sometimes she is just bouncing around with 3-lb weights, moving them in different ways, making up the moves as she goes along.'

Making up the numbers: Iron Chef cook Alexandra Guarnaschelli was also there

Making up the numbers: Iron Chef cook Alexandra Guarnaschelli was also there

Taking a pounding: Tracy and Gwyneth waving around three pound weights on Oprah

Taking a pounding: Tracy and Gwyneth waving around three pound weights on Oprah

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