Jennifer Aniston and Justin Theroux would like their wedding to have a "vacation feeling."

The 43-year-old actress and the actor have been dating for around 15 months and became engaged on Justin's 41st birthday August 10.

The couple are now reportedly discussing wedding details.

Jennifer and Justin are fleshing out exactly what kind of affair they want to host.

"[Jennifer wants a] destination wedding, kind of like eloping with a few friends," an insider told Us Weekly.

"There will be the feeling of a vacation, since that's their favourite thing to do.

Justin wants a New York City winter wedding. [Jennifer wants to] celebrate in high style. Justin isn't as flashy as the men she's been with in the past, so it won't go too over-the-top."

Justin has never wed and this will be Jennifer's second down the aisle, as the actress and Brad Pitt were married for around five years before divorcing in 2005.

Jennifer is elated about marrying again.

"Jen is over the moon about her second chance at a happy marriage," the source revealed. "Justin is giving her a solid vow to love."