The Wanted star became engaged to Keegan last summer, six months after they were first linked together.
During an interview on KIIS-FM, presenters Ryan Seacrest and Ellen K noted that the singer Max George was engaged. However, in response George simply stated, "No, no, no, not anymore," before the line went dead.
The presenters told listeners that the "innocent question" was not "contrived" and that they would attempt to reconnect with the 23-year-old.
When they had, he was asked if he was enjoying the benefits of being in a boyband, to which he replied: "Absolutely."
The station's Twitter feed also posted: "BREAKING: @MaxTheWanted from @thewantedmusic is not engaged anymore!"
Listen to George speak to KIIS-FM below:
However, a spokesperson for Keegan told Digital Spy that the pair remain together, explaining: "Michelle and Max are still very much together as a couple, but they are both traditionalists and realised that there is no point in being engaged until they are in a position to plan a wedding."
Both Keegan and George had denied split rumors earlier in the year, with a spokesperson for the actress stating that a date for the wedding had never been set in place by the couple.
The Wanted are currently on a promo tour in the US, which saw them perform hit single 'Glad You Came' on American Idol last week.
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