Tom shared the happy news while taking part in a Q&A session at Regent Street's Apple Store on Monday (7 April).
"We are now married, which is nice," said Tom. "I know that was just made legal in the UK which is great, but we were married in the States."
Tom and Richard met in New York in 1986 when a then-25-year-old Tom was still working to make his mark in the fashion industry and Richard, then 38, was fashion editor at Women's Wear Daily magazine.
Back in 2011, Richard told Out Magazine: "I couldn't imagine being without Tom now. I couldn't imagine what I'd be like if something happened to him. There's only one Tom for me. He is still that man who I met 24 years ago, who has a good heart."
Tom, meanwhile, told WWD: "I went to a fashion show and this silver-haired guy was staring at me with these piercing water-blue eyes. It scared me because I absolutely saw and knew my entire future."
He added: "We had three dates. We were living together four weeks later; he gave me the keys to his apartment and we have lived together ever since."
Tom and Richard live in London with their son Alexander 'Jack' John Buckley Ford, who was born in Los Angeles on 23 September 2012.
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