According to earlier reports, the couple are keen to have a British wedding once the 'Two and a Half Men' star's divorce from ex-wife Demi Moore is finalised - and it has now emerged he wants to take his new bride on one of Sir Richard Branson's flights into space.
The British business tycoon has set up a project to allow people to embark on the incredible two-hour commercial trips and Ashton - who already bought his £124,000 seat - wants a truly special honeymoon.
An insider told The Sun on Sunday newspaper: ''Ashton is already going into space on Branson's Virgin Galactic flight and he has said Mila will definitely be at this side as his honeymoon present.''
The couple are said to want to get married as soon as they can because they have plans to settle down and start an ''old-fashioned'' family.
A source previously revealed: ''Mila and Ashton have fallen in love with the UK.
''They are desperate to get married as soon as possible because they want to start a family and are slightly old-fashioned about these things.''
The first trip is due to happen this Christmas Day (12.25.13) with more flights following in 2014.
Passengers will travel 62 miles in altitude - the internationally recognised boundary of outer space - and will experience weightlessness and an incredible view of the curve of the Earth.