The event is a precursor to the main awards ceremony, which will be held at the Scottish Exhibition and Conference Centre in Glasgow on 30 September 2009.
Performances at The May Fair, situated in London's Mayfair village, are expected from JLS and Jade Ewen. Attendees will also learn who has been nominated for the main awards.
"With the awards ceremony being held in Scotland this year, it seemed only fitting to bridge the countrywide gap with a London-based nominations party," said MOBO Awards CEO and founder Kanya King MBE.
"During our 14-year history we have hosted our awards in every prestigious venue in London. In that vein it is fitting that the nominations launch is held at one of London's most glamorous hotels."
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