James Norton, the 40-year-old actor known for Happy Valley, completed his first London Marathon in 4 hours and 29 minutes, raising £132,000 for Breakthrough T1D, a charity supporting type 1 diabetes research.
Marathon Milestone Amid Health Challenges
Norton crossed the finish line on Sunday despite battling a chest infection that made the 26.2-mile race particularly grueling. He shared triumphant Instagram photos, including one holding his medal high alongside his rarely seen parents and another showing his glucose monitor to six-year-old Emma, a fellow type 1 diabetic diagnosed at age two.
“Did it. Just,” Norton posted. “Had a chest infection which made it pretty gruelling, but the incredible support from the crowds carried me to the finish line. So much love and sweat and tears. A mad and beautiful experience.”
He thanked donors, noting the funds, boosted by the Bukhman Foundation, aid young diabetics nationwide and advance research toward a cure. Norton highlighted his Dexcom G7 monitor and Omnipod 5 pump, worn 24/7, which kept his glucose levels stable during the event.
Personal Battle with Type 1 Diabetes
Diagnosed at 22 after symptoms like weight loss, frequent urination, and fatigue, Norton calls his condition a “mini-superpower” fostering empathy for others facing differences. His mother and sister also live with type 1 diabetes, an autoimmune disease requiring daily insulin to manage high blood glucose.
“Love to all my fellow T1D warriors out there. We got this,” he wrote.
Technology Transforming Daily Life
Norton relies on continuous glucose monitors (CGM) like Dexcom, which alert him to lows before symptoms strike. Previously, severe overnight hypos left him panicked and disoriented; now, beeps allow proactive management, improving sleep and reducing anxiety.
“You cannot underestimate how much difference Dexcom gives you in your life. It’s huge. It gives you power. It gives you freedom from diabetes,” he stated. His family shares the experience, jokingly checking phones at the dinner table when alerts sound.
Navigating Fame and Acting with Diabetes
At the 2024 GQ Men of the Year Awards, Norton’s blood sugar crashed after insulin dosing for an expected carb-heavy meal. Served a low-carb “fashion dinner,” he sweated profusely opposite Nicole Kidman. He discreetly sought orange juice from a waiter, sparking chaos with a rushed bowl of potatoes mid-Jude Law’s speech.
“I was dripping with sweat,” he recalled on the Off Menu podcast. “It’s fraught when you’re eating out.”
On stage, adrenaline disrupts levels. In 2023’s A Little Life, he covered his sensor and mic pack with bandages for nude scenes. During 2011’s Journey’s End, co-stars mistook his shakes for shock, improvising “tea” with Lucozade. He stitches costume pockets for sugar tablets in period dramas.
Low glucose brings anxiety and “existential dread,” but Norton persists, proving diabetes need not limit marathons, acting, or life.

