JLS have planned bandmate Marvin Humes' stag party with the help of a former real-life secret agent.

The 'Proud' hitmakers have devised a top secret plan along with a former MI5 agent to help kidnap the 26-year-old star - who proposed to The Saturdays' singer Rochelle Wiseman over the festive period - and give him a fright ahead of his nuptials this summer.

Oritse Williams said: ''I have met up with an ex-MI5 guy who is helping us plan Marvin's stag do.

''We are taking this thing deadly seriously and will be rehearsing it. It is a covert MI5 operation.

''This guy has told us he will help us get it done in the most discreet way so Marvin will have no idea what will hit him.''

Oritse is determined to get his own back on Marvin after the boy band - who are also made up of Aston Merrygold and J.B. Gill - hired a cougar stripper for his 25th birthday last November and made him lick whipped cream off her chest.

He added to The Sun newspaper: ''After what Marvin did to me on my birthday I am going to make sure his life is hell. It was the most shocking thing that has ever happened to me. I'm not letting it go.''