Ashton Kutcher is flying to Britain this week to spend time with Mila Kunis.

The 'Two and a Half Men' heartthrob has been missing his girlfriend while she has been shooting her new film 'Jupiter Ascending' alongside Channing Tatum in London and so has decided to come to see her.

The pair are planning a big night out in the UK capital while Mila, 29, has a break from work.

A source told The Sun newspaper: ''Mila's schedule won't be so intense so she'll get some good time with Ashton. They'll be staying in her rented place in north London and won't keep keeping their heads down. They plan to go out - a lot.''

Mila - who previously dated actor Macaulay Culkin - has been preparing for her role in the sci-fi flick by training at a shooting range in Hertfordshire, East England.

The couple first met on the set of their hit sitcom 'That '70s Show', which ran from 1998 to 2006, but they only began dating after Ashton, 35, split from ex-wife Demi Moore last year.

Ashton recently admitted he's keen to keep the relationship quiet after realising how ''valuable'' privacy is when it comes to his love life.

He explained: ''You know, I've learned the hard way how valuable privacy is. And I've learned that there are a lot of things in your life that really benefit from being private. And relationships are one of them. And I am going to do everything in my power to have this relationship be private.''