Jennifer Aniston and Justin Theroux have reportedly set a date for their wedding.

The 45-year-old actress and 'The Leftovers' actor got engaged in August 2012 and have yet to announce when they are planning to hold their big day but are now said to have finalised their plans.

A source told the US OK! magazine: ''It's really happening! Jen is excited beyond belief. She says it will be the best day of her life.''

However, despite having decided on a date and venue, Jennifer - who was previously married to 'Fury' actor Brad Pitt - is said to be remaining tight-lipped about the nuptials.

The insider continued: ''If you try asking, she'll change the subject to keep everybody guessing.''

The couple - who met while starring alongside one another in 2012 film 'Wanderlust' - are said to have revealed, however, that they want to be a low-key affair.

The source added: ''Neither of them wants a huge, glitzy wedding.''

Meanwhile, 43-year-old Justin previously confessed he felt a lot of pressure from the public to marry his fiance of two years, but that he wasn't bothered by it.

He said at the time: ''There is this hum of pressure that - I can't stress enough - I just don't pay any attention to ... We're just doing our own thing. We are completely happy, obviously, but we're not on anyone else's timeframe.''