Dane publicly revealed in April 2025 that he had been diagnosed with ALS.
The progressive neurological disease damages the nerve cells responsible for controlling voluntary muscles. As it advances, patients can lose the ability to move, speak, swallow and eventually breathe independently.
Dane continued working after revealing his diagnosis and initially expressed hope about returning to Euphoria.
But his condition progressed.
Rather than keeping the illness entirely private, Dane increasingly used his public platform to raise awareness about ALS and advocate for patients.
In 2025, the ALS Network named him its Advocate of the Year in recognition of those efforts.
His family’s statement following his death emphasized that advocacy as an important part of his final months.
The Role That Made Him “McSteamy”
For many viewers, Dane will always be Mark Sloan.
He joined Grey’s Anatomy in 2006 as the charismatic plastic surgeon whose arrival immediately complicated the relationships among several of the show’s central characters.
Nicknamed “McSteamy,” Sloan quickly became one of the medical drama’s most recognizable characters.
But Dane eventually gave the role more depth than its handsome-doctor introduction suggested.
Mark became a father.
A mentor.
A loyal friend.
And his complicated relationship with Lexie Grey became one of the show’s most memorable romances.
Dane remained with Grey’s Anatomy until 2012, leaving behind a character still remembered more than a decade later.
‘Euphoria’ Introduced Him to Another Generation
Years later, Dane found another major television role that couldn’t have been more different.
Beginning in 2019, he played Cal Jacobs on HBO’s Euphoria.
Gone was the charming surgeon.
Cal was a deeply troubled father carrying years of secrecy, repression and destructive behavior.
The performance introduced Dane to a younger generation of viewers while demonstrating a considerably darker side of his acting range.
Following his death, Euphoria creator Sam Levinson said he was heartbroken by the loss of his friend and described working with Dane as an honor.
HBO also paid tribute to the actor and his work on the series.
His Career Went Far Beyond Two Television Shows
Although Grey’s Anatomy and Euphoria became his defining roles, Dane worked steadily across television and film for decades.
He starred as Tom Chandler in TNT’s The Last Ship and appeared in films including Marley & Me, Valentine’s Day, Burlesque, X-Men: The Last Stand and Bad Boys: Ride or Die.
His career stretched from smaller television appearances in the 1990s to major roles across several generations of American television.
But during his final year, his public identity increasingly included something beyond acting.
He became an advocate.
He Used His Final Months to Speak About ALS
After his diagnosis, Dane participated in efforts aimed at increasing awareness and support for people living with ALS.
He appeared in Washington in 2025 to discuss issues affecting patients and used the visibility his acting career had given him to draw attention to the disease.
The ALS Association later remembered Dane for continuing to advocate not only for himself, but for other patients and their families.
His openness made the rapid progression of his illness particularly difficult for longtime fans to witness.
Less than a year passed between Dane publicly revealing his diagnosis and his death.
Hollywood Remembered Him
Following the announcement, messages from actors, collaborators and fans spread across social media.
ABC and 20th Television praised the lasting impact of his work on Grey’s Anatomy while also recognizing the courage he showed after his diagnosis.
Others remembered the person behind the roles.
Former colleagues spoke about his humor, warmth and devotion to his daughters.
And for fans, the news prompted another wave of memories from two very different chapters of television.
Some remembered Mark Sloan walking into Seattle Grace and instantly becoming “McSteamy.”
Others knew Dane first as the complicated and disturbing Cal Jacobs.
Both characters demonstrated how much range he possessed.
His Family Came First
Dane married Rebecca Gayheart in 2004.
Although Gayheart filed for divorce in 2018, she requested that the petition be dismissed in 2025, shortly before Dane publicly announced his ALS diagnosis.
They remained married at the time of his death.
Together they shared two daughters, Billie and Georgia.
In the family’s final statement, those relationships—not awards, ratings or famous characters—were placed at the center of his life.
Dane was only 53.
His illness progressed with devastating speed.
Yet during the time he had after making his diagnosis public, he continued acting as long as he could and used his platform to bring greater attention to ALS.
For television audiences, Eric Dane leaves behind two characters belonging to very different eras: the magnetic Mark Sloan of Grey’s Anatomy and the deeply complicated Cal Jacobs of Euphoria.
For his family, however, his most important role was never on television.
He was a husband and a father.
And according to those closest to him, Billie and Georgia remained the center of his world until the end.