The couple, who became engaged earlier in the year, smiled for the cameras after enjoying a family meal at C London restaurant.
Joined by Wiseman's uncle, footballer Paul Ince, JLS star Humes gripped his fiancée's hand as he led her through the waiting photographers to their car.
Dispelling claims that she had postponed their big day, Wiseman took to Twitter yesterday, writing: "Apparently our wedding has been called off according to magazines, news to me I'm planning away! #getitright xxx (sic)"
The 22-year-old added: "Love my @OliviaRubin dress I wore last night! Her pieces are so good for my shape! Trouble is I want it all! Haha xx"
Representatives for the singers also denied the two reports, one of which said the Saturdays star is "struggling" to plan their big day.
> Marvin Humes 'stuttered and stumbled' during Rochelle Wiseman proposal