While details of the former 'Friends' star and the 'Your Highness' actor's nuptials, which are due to happen in the next few weeks, are being kept under wraps, it is thought they will tie the knot on the island after deciding it would be ''too difficult'' to keep quiet in Los Angeles.
A source said: ''Jen would have liked to have done it at home in Los Angeles but it looks like that would be too difficult to keep quiet.
''She doesn't want to get married with photographers buzzing around her head in helicopters.
''Justin just adores Hawaii. It's his favourite place in the world and he has a little house on the island of Kauai.
''His cottage is too small to host the wedding and Jen thinks it has too many memories of his old flames anyway.
''But they both love the island and the idea of a laid back Hawaii wedding in the sunshine.
''They have looked at some expensive villas including one where they enjoyed a romantic holiday in 2011.''
Ben Stiller is reportedly in line to be Justin's best man at the wedding, which is expected to be a small and intimate affair with just the couple's closest family and friends attending.
The source added to The Sun newspaper: ''Jen is going to great lengths to keep the wedding details a secret so it does not become a huge media circus like her wedding to Brad.
''Just a few dozen of their closest family and friends will be there. But news is beginning to leak that the date is just a few weeks away now.
''Ben Stiller, a big buddy of Justin's, has a house over there too so that could be a surprise option.''
Should Jennifer - who has already said to have chosen a date for the nuptials, a dress, and picked out the couple's wedding rings - tie the knot in the next two weeks then she looks likely to beat Angelina Jolie, who is engaged to the 44-year-old beauty's ex-husband Brad Pitt, down the aisle.
The 'Horrible Bosses' star is said to want TV host Chelsea Handler as one of her bridesmaids and her goddaughter, Courtney Cox's eight-year-old daughter Coco, will be her flower girl.