Jennifer Aniston and Justin Theroux.
Jennifer Aniston is expected to choose Hawaii as the location for her wedding. Facebook

Jennifer Aniston is set to have a secret wedding in Hawaii.

The 45-year-old star is expected to tie the knot with fiancé Justin Theroux at a small ceremony with 20 of their closest friends in attendance.

The couple, who have been engaged for nearly two years, have been frequent visitors to the Hawaiian islands and were spotted in Kauai in 2011, where they were reportedly staying at Ben Stiller's mansion.

'They had a very special trip there,' a source told US Weekly, prompting speculation that it may be the location for the wedding.

Aniston she filmed the Adam Sandler comedy Just Got With It in Maui and was spotted at hotels in the area during the course of filming.

The Friends star also spent a holiday with former co-star Courteney Cox in the region, where the two were spotted paddle boarding.

Meanwhile, Aniston and Theroux have been working on separate coasts with the actress based in LA for the shoot for Cake and her 42-year-old fiancé in New York City making HBO's The Leftovers.

No wedding date has been set yet for the Wanderlust co-stars, but it has been reported that they will definitely walk down the aisle in 2014.