Mila Kunis ensured both she and her car were well fully fuelled today.

The 29-year-old actress was spotted at a Los Angeles gas station, ready for her regular workout in a a form-fitting gym ensemble.

Mila put her enviably toned figure on display in her tight outfit, going make-up free and hiding behind a pair of shades.

The Black Swan actress - who is dating Demi Moore's estranged husband Ashton Kutcher - is due to start filming her new sci-fi action movie Jupiter Ascending, so perhaps that is why she is hitting the gym so hard at the moment.

Channing Tatum is set to co-star with her, playing a bounty hunter out to track her down in the not-to-distant future.

Speaking to MTV Movies she said: 'It's going to be awesome! I really can't say anything, but I think it's going to be awesome. I think it's going to be really great.'

One person that must be loving the results her current fitness kick is Kutcher.

The Ted actor was recently spied backstage on the set of Ashton's new TV series Two and a Half Men, in which he replaced Charlie Sheen after the veteran actor's very public meltdown late last year.