While neither camps of Ashton Kutcher and Mila Kunis have confirmed their engagement, Mila has not been shy in wearing a little sparkler on her ring finger practically screams engagement for this very private couple.

However, while they're ready to make the commitment to spend the rest of their lives together, a close friend of the couple told People Magazine: "It won't necessarily be a short engagement. They haven't begun planning the wedding yet."

The source further details that the couple have already been engaged for a couple of weeks meaning they've managed the rare feat of keeping their personal lives under wraps.

Mila has recently revealed that they like to keep things casual saying, "'We have a thing called white T-shirt night and it's when you wear jeans and a white T-shirt and you go on a date,' she told Cosmopolitan magazine. 'Nothing fancy, it's just something that you love to do. And whether that's bowling or dinner or going to a cheese shop and have some wine or walking around,' Recalls the Daily Mail.

The ring is not over-the-top and low-key, just like the couple likes it. 'It's a simple band with a round diamond,' described a friend. 'No baguettes, no insets. It's not ostentatious, like a Kim Kardashian ring. She doesn't need a security team with her to wear it. It's a lot like her and Ashton.'

To see the ring, see the rock that Ashton has reportedly put on Mila's finger, click here.

The pair began dating in April of 2012 when Ashton and his then-wife Demi Moore had already separated. The couple began dating approximately seven-months after the marriage ended. Once the divorce was made official November 2013, news quickly spread of the eventual engagement of Kutcher to former colleague Mila, recalls ET Online.

The pair were former co-stars on That 70s Show and first kissed on-screen back in 2008 when Ashton was 20 and Mila was only 14.