The happy couple were married in a low-key ceremony at the Mayfair Library in London on Monday, followed by a reception to celebrate near Tower Bridge, the Mirror reports.
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Steve Jones and Phylicia Jackson have married in London
Steve, 37, proposed to Phylicia in September as they holidayed in Puglia, Italy with her friends and family. One month later, they exchanged vows; Phylicia wearing a strapless cream satin dress with a net veil fascinator, and Steve in a fitted grey suit offset with a burgundy tie.
On Monday, the beautiful bride gave fans a glimpse of her wedding dress with a sweet photo posted on her Instagram page, which she captioned, "Mrs Jackson-Jones."
"They are absolutely over the moon," a source told the newspaper. "All their friends and family are delighted for them.
'Mrs Jackson-Jones' on her wedding day
"It might seem to have happened incredibly quickly to outsiders, given that they only had a few weeks to plan the entire day, but they couldn't be happier.
"They spent two months on a road trip around Europe over the summer, which is when Steve decided she really was The One."
Las Vegas-born Phylicia, a fitness and lifestyle coach-come-model, first met Steve in LA while he was presenting The X Factor USA in 2011. She then moved back to the UK with him the following year.
Despite only lasting one series on the show, Steve has said, "I met my girlfriend in the States so it was definitely a worthwhile trip."
TV star Steve Jones proposed with a beautiful vintage diamond and emerald ring
Prior to settling down with Phylicia, Steve famously dated Fearne Cotton, Pamela Anderson and Hayden Panettiere.