Billie Eilish’s Weight Loss: How the Bad Guy Singer Transformed Herself Incredibly

Billie Eilish calls herself the gym rat, as she has a strict workout routine. From diet to workout, here's everything about Billie Eilish's weight loss journey.

Sanchari Bhattacharya
Written by Sanchari Bhattacharya , Health & Fitness Expert
Updated on Apr 10, 2025 | 01:46 PM IST | 15.7M
billie eilish weight loss
Billie Eilish weight loss (Image Source: Getty Images)

Billie Eilish, the renowned American singer and songwriter, has been quite transparent with fans regarding her life and health. Billie Eilish's weight loss transformation stunned the audience, and she feels incredibly proud of her fitness journey. 

Billie dealt with struggles with body image throughout her life and used to wear baggy clothes to feel comfortable. However, recently, she took things into her own hands and decided to get healthier and fitter. She didn't focus on fad diets. Instead, she made healthy changes in her diet and indulged in a strict workout routine, becoming a "gym rat" to shed pounds. 

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Stay tuned to the end of the article to learn about Billie Eilish’s weight loss diet and fitness regime.

Who Is Billie Eilish?


Billie, born on December 18, 2001, is the daughter of actress and teacher Maggie Baird and actor Patrick O'Connell. They both are musicians and also work on Eilish's tours. She has an older brother, Finneas O'Connell, with whom she collaborates and conducts live shows. 

The young personality is the 26th-highest-certified digital singles artist according to the Recording Industry Association of America (RIAA) and Billboard. She has earned multiple accolades including two American Music Awards, Golden Globe Awards, Academy Awards, nine Grammy Awards, three MTV Video Music Awards, and Brit Awards. Billie also holds two Guinness World Records and is renowned as the second artist in Grammy history to win the Record of the Year, Best New Artist, Song of the Year, and Album of the Year, all in the same year.

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Additionally, Eilish focuses on climate change awareness, women's reproductive rights, gender equality, and animal rights, and also has a history of political activism.

Read More: Jacob Batalon’s Weight Loss: How the “Spider-Man” Star Shed 100 lb

Billie Eilish’s Early Life And Struggles with Body Image


Billie Eilish's transformation can be traced back to when she was a child. She grew up in a house full of artists. Her parents decided to homeschool her so that they could spend quality time together as a family, allowing her to pursue her passions. It is all because of the parents, Billie and her elder brother managed to find fame and success in the field of music. 

Despite being homeschooled, Billie faced a lot of body image issues. She used to believe that her body was too big compared to the other girls her age. Hence, she struggled to tone herself by cutting down on food and starving herself. 

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At the age of 11, she was diagnosed with Tourette syndrome and suffered from synesthesia while dealing with depression. It is a disorder that occurs before the age of 21, characterized by simple and complex motor tics, vocal tics, and frequently obsessive-compulsive symptoms (1). When Billie was a child, she was a victim of sexual abuse and identified herself as bisexual. 

At the age of 12, Billie vouched for weight loss pills to attain a better body shape, however, the pills weren’t effective. This affected her overall confidence and self-image and things worsened when she met with an injury. 

Before kickstarting her career in music, she loved dancing until she reached age 13. While dancing, Billie injured her growth plate. It was torn and separated from her hips, due to which she couldn’t move straight for a month. This injury was hence one of the reasons behind her gaining weight. 

Read More: Jake Gyllenhaal's Workout: How He Got Jacked for “Road House”

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Billie’s Self-image And Fans’ Reactions


Billie was spotted donning mini skirts, tight crop tops, and dresses during the initial phase of her career. However, after gaining popularity, she covered herself with clothes that were baggy and relaxed. She wore the largest sizes possible and tried to hide her actual figure and weight. 

The way Billie’s self-image was formed over the years, it was believed that wearing ill-fitted apparel was the only option left with her. Due to her baggy attire, fans and commenters never attacked her insecurities.

Once, she posted a picture of a form-fitting outfit and her fans bombarded her with comments, concerning her body, figure, weight, and overall appearance. Although the comments were not much appreciated, Billie stood strong and began addressing them positively. Whoever made fun of her, she requested them to start “normalizing real bodies.” 

How Did Billie Eilish Manage to Lose Weight?


Billie Eilish’s weight loss journey and public influence wasn’t easy. Despite all the body struggles and negative comments, she rocked outfits that no longer hid her actual frame. 

Gradually, she has been working out and eating healthy food. In one of the interviews, she called herself a ‘gym rat’. The artist was also firm enough about how she wanted the public to view her weight loss story. In fact, losing or gaining weight wasn’t her goal. What she aims for is to build a healthier body that will support her performing career. 

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Once, the singer also shared that she has been completely changing her way of living by involving fitness. It has been an incredible part of her weight loss journey and she truly feels much better when on stage. 

Read More: Lauren Ash Weight Loss: How the ‘Superstore’ Star Shed Pounds Amidst Illness 

What Was Billie Eilish’s Weight Loss Diet Plan?

Billie Eilish’s Weight Loss

(Image Source: Getty Images) 

In one of the interviews, Billie Eilish mentioned that she had an iron deficiency, and her mom used to give her iron supplements. Iron deficiency anemia arises when the balance of iron intake, iron stores, and the body's loss of iron are insufficient to fully support the production of erythrocytes, a type of blood cell that is made in the bone marrow and found in the blood. (2). 

Erythrocytes are basically red blood cells that are the functional components of blood responsible for the transportation of nutrients and gases throughout the body (3).

Since a teenager, the Bad Guy artist has been a vegan. After acquainting herself about meat and dairy products, she decided to be a vegan, to keep herself on the right track. As per research and WHO nutrition recommendations, meat is a source of saturated fatty acids and one should limit it to less than ten percent of total energy consumption (4). On the other hand, intake of milk and dairy products is associated with a reduced risk of childhood obesity (5).

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Furthermore, she advocates against animal cruelty and is also lactose intolerant. Her weight loss diet plan includes lean proteins, leafy greens, whole grains, and healthy fats. In addition, she keeps herself hydrated and consumes fresh fruits by monitoring portion sizes. Reportedly, her favorites are avocados, tofu, and loads of ramen. 

According to research, proteins improve appetite, body weight management, and cardiometabolic risk factors (6). Moreover, it is advised to focus on healthier dietary patterns by consuming food rich in healthy fats including nuts, vegetable oils, and other plant sources of fats for better weight maintenance (7). 

Another element that has helped Billie maintain her weight is self-control and discipline, along with a dedicated gym routine. 

Read More: Selena Gomez’s Weight Loss Journey with Positive Body Image

Billie Eilish's Workout Routine


Billie Eilish’s workout routine typically consists of strength training, dancing, treadmills, and yoga. She requires physical intensity and works out to prevent future injuries and strengthen her muscles. Research states that physical fitness also reduces the risk of premature death (8). 

According to research, strength training and endurance adaptations contribute toward potential sporting excellence (9). In addition, yoga enhances body flexibility, promotes muscular strength, and also improves respiratory and cardiovascular function (10).

The Grammy-winning artist does find a difference in herself, especially while performing and moving freely on the stage. She is a better version of herself and her relationship with fitness played a big role in her weight loss journey. 

Billie Eilish Before And After Weight Loss Images 

Before 

Billie Eilish Weight Loss

(Image Source: Getty Images)

After


Despite facing body image issues, Billie Eilish didn't lose hope and made simple changes in her lifestyle to become a healthier version of herself. By spending time in the gym, adding healthy foods to her diet, and having a disciplined approach to fitness, she managed to tone down. Billie Eilish's weight loss story proves that by taking small steps toward fitness, one can easily achieve weight loss goals and overcome all odds. 

Sources

1. Tourette's syndrome: clinical features, pathophysiology, and therapeutic

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3181853/

2. Iron Deficiency Anemia: A Common and Curable Disease

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3685880

3. Histology, Red Blood Cell

https://www.ncbi.nlm.nih.gov/books/NBK539702/ 

4. Meat and Human Health—Current Knowledge and Research Gaps

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8305097/ 

5. Milk and dairy products: good or bad for human health? An assessment of the totality of scientific evidence 

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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5122229/ 

6. The role of protein in weight loss and maintenance 

https://www.sciencedirect.com/science/article/pii/S0002916523274274#:~:text=Collectively%2C%20these%20data%20suggest%20that,or%20all%20of%20these%20health 

7. A healthy approach to dietary fats: understanding the science and taking action to reduce consumer confusion 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5577766/

8. Health benefits of physical activity: the evidence 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1402378/ 

9. Adaptations to Endurance and Strength Training

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5983157/ 

10. Exploring the therapeutic effects of yoga and its ability to increase quality of life 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3193654/ 

FAQ's

How did Billie Eilish deal with body shaming?
Billie Eilish ignored the rude remarks and engaged in activities that diverted her mind to dealing with body shaming.

How does Billie Eilish maintain her health?
Billie Eilish maintains her by working out and eating a balanced diet.

About The Author
Sanchari Bhattacharya
Sanchari Bhattacharya
Health & Fitness Expert

Sanchari, a certified Health & Nutrition Life Coach and Naturopath, has 10+ years of experi...

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