Cullum, who also performed at the fifth edition of the festival in 2007 , will perform on Thursday February 20th at Festival Park.
Well known for his covers of classic jazz standards and jazz-crossover pop offerings, multi-instrumentalist Cullum has become one of the best selling jazz musicians in the UK.
2014's festival will run from Thursday February 13th to Friday February 21st, when eight headline acts will play over four main concert nights, and five nights of smaller Jazz Garden concerts.
Olly Murs has already been confirmed as a headliner  and will play on Valentine’s Day.
The 2013 edition saw headliners The Script, OneRepublic , Three Doors Down and Deep Purple play to more than 55,000 people.
For more information, go to www.dubaijazzfest.com.