Alopecia caused my hair to fall out in clumps, making me unrecognizable as an actor while preparing to film with Glen Powell.

Greg Grunberg, known for playing the affable best friend in series like Heroes, Felicity and Alias, was on his way to Europe earlier this year to reunite with lifelong friend and collaborator J.J. Abrams for the new film Ghostwriter when something unexpected happened: his thick hair began falling out in large clumps almost overnight. Soon, he lost his eyebrows and eyelashes as well and doctors diagnosed him with alopecia.

The National Alopecia Areata Foundation describes the condition as an autoimmune disorder that causes hair loss on the scalp, face and other parts of the body. According to the Cleveland Clinic, nearly 7 million Americans are affected, with children representing about 20% of cases.

Now 59, Grunberg is confronting the daily realities of developing alopecia unexpected side effects, awkward comments and major adjustments. At the same time, hes using the opportunity to raise awareness and connect with others facing the same condition. Advocacy comes naturally to him; he and his wife of over three decades, Elizabeth, share three adult sons, and he previously cofounded Talk About It! to promote epilepsy awareness after his eldest sons diagnosis. He has also raised millions for charity through performances with celebrity music groups such as Band From TV and Action Figures.

In a conversation with Yahoos Suzy Byrne, Grunberg whose recent work includes roles in Star Wars: The Rise of Skywalker and The Fabelmans reflects on how losing his hair has reshaped his life and outlook.

The Sudden Onset

Despite working in front of the camera, Grunberg insists he has never been a vain person. Even so, seeing an unfamiliar version of himself in the mirror has been a shock. The change began months after his full knee replacement surgery in October 2024 a procedure made necessary by an old injury he sustained performing a stunt on Heroes, which eventually led to debilitating arthritis.

While the operation succeeded, he believes the stress from surgery and other life events may have triggered alopecia that had been dormant. His recovery involved months of physical therapy, during which he was also preparing to perform with Action Figures on Comic Con: The Cruise. Then came the Los Angeles wildfires, during which his family hosted friends who had been displaced. Amid the chaos, his hair began falling out rapidly.

Right as he was about to fly to Europe to film with Abrams, Samuel L. Jackson, Glen Powell and Jenna Ortega, the hair loss intensified. After confiding in Abrams, he decided to shave his head before filming. His remaining facial hair disappeared soon after, and the hair and makeup team created on-set brows and a goatee for him. To his surprise, he actually liked the new look and Abrams reassured him he looked great.

Finding Answers

Back in Los Angeles, Grunberg met with a UCLA specialist who also has alopecia, which immediately gave him comfort. She confirmed what many patients hear: while stress often plays a role, there is no definitive explanation. Grunberg remains healthy otherwise and is now trying a JAK inhibitor in hopes of stimulating hair regrowth, though he understands the results may be inconsistent or temporary.

After initially telling social media followers that he shaved his head for a role, he later felt compelled to be honest. Having spent years encouraging openness around epilepsy through Talk About It!, he realized he had to practice the same transparency. He shared his alopecia diagnosis publicly in May.

Adjusting to a New Reality

The physical changes have brought unexpected hurdles. Without eyebrows or eyelashes, sweat easily runs into his eyes. The loss of nose hair something hed never thought about has affected his natural filtration. And with more exposed skin, sunscreen has become essential.

Still, hes learning to adapt. No haircuts or shampoo means saving money. He doesnt need to shave daily. His sister-in-law, who also has alopecia, recommended a faux brow pen he now uses. He wears non-prescription glasses to add definition and has experimented with hats, only to realize they sometimes feel like a way of hiding. Hes committed to embracing his appearance without wigs, toupees or implants.

Messages from families of children and young adults with alopecia have helped put everything into perspective. Therapy has also been beneficial the first time hes sought it complementing the support he receives from his wife and Abrams.

Facing Public Reactions

Not every encounter has been positive. Some people make blunt or insensitive comments, and strangers occasionally stare, unsure of whether he is ill or simply looks familiar. Interestingly, the hair loss has also brought a kind of anonymity; once recognized everywhere, he now sometimes goes unnoticed.

Seeing himself in photos still feels uncomfortable, and he often opts to stay behind the camera at gatherings. But he continues to move forward, informing colleagues of his new look and joking that he is now being considered for villain roles. Still, he pushes back on stereotypes insisting that bald characters can also be caring, funny or heroic.

Ultimately, Grunberg believes people respond to the energy you project. By being open, confident and optimistic, he hopes others will meet him with the same attitude. And thats the approach he intends to keep embracing.

Author’s Commentary: Greg Grunberg’s Journey with Alopecia

Greg Grunberg’s recent experience with alopecia underscores how sudden health changes can reshape both personal and professional life. The actor, widely recognized for his roles in Heroes and Felicity, faced rapid hair loss just as he was preparing for a major film project in Europe. While the trigger appears linked to stress following surgery and other life events, medical experts emphasize that alopecia remains largely unpredictable.

Grunberg’s decision to publicly share his diagnosis reflects a commitment to transparency and advocacy, consistent with his past work raising awareness for epilepsy. His openness has not only helped normalize conversations about autoimmune conditions but also provided support to families and individuals facing similar challenges.

Adjusting to daily realities—ranging from skin care to coping with public reactions—has required significant adaptation. Grunberg’s approach, combining medical consultation, practical solutions, and emotional support, illustrates a proactive strategy for managing chronic conditions while maintaining professional commitments.

Ultimately, Grunberg’s experience highlights the importance of resilience, self-acceptance, and advocacy. By embracing his appearance without concealment and addressing public perception directly, he models a constructive path for others navigating sudden health transformations.

Sources:

• 'I was about to film a movie with Glen Powell when my hair started falling out in clumps. Alopecia has made me unrecognizable as an actor.'