“I used to leave London every Sunday to Los Angeles and fly back overnight Wednesday to do the show and back for 11 weeks,” he said on The One Show.
“It was impossible because the rules were changing, getting through the airport is not like it used to be so it created a situation which was unsustainable.”
Speaking about his decision to leave, Bruno added: “I miss it so much. unfortunately, Dancing with the Stars has moved onto Disney Plus, it’s going to be streaming live on Disney Plus.
“They need continuity and I absolutely support it, it’s my decision and I think Anton has done a fantastic job he deserves to be on that seat.”
Good Morning Britain airs weekdays at 6am on ITV.