The loved-up star described her husband - whose real name is Stephen Manderson - as her ideal company for an evening out, admitting while they aren't each other's type, their relationship works and he makes her laugh.
She told the Mail on Sunday newspaper's Event magazine: ''[My dream dinner date would be] Stephen. He took me to the Groucho Club in London for our first date.
''He said: 'You're not the sort of bird I go for,' and I said, 'Well, you're not the type of guy I normally go out with - I go for the bad boys!'
''He's funny and cool and makes me laugh - and that is why I married him!''
Although the couple - who got married in September 2013 - are loving their time together, they don't have any plans to expand their family yet, with Millie recently claiming they were focusing on their new home for now, rather than a baby.
She previously said: ''I'm just so busy at the moment and the house is like our baby, our project. I have so many other things going on at the moment work-wise. Just renovating a house is stressful. You don't realise how expensive it is either. I can't even go shopping!
''Everyone's asking what my summer plans are and I'm just like, 'Moving!' ''
The Guardians return two months after their epic battle against Ronan with their criminal records erased