Rumer Willis thinks Ashton Kutcher and Mila Kunis's baby is cute.

The 26-year-old actress - whose mother, Demi Moore, was married to Ashton for eight years until they split in 2013 - has revealed that she ''reached out'' to Ashton and Mila when their baby, Wyatt Isabelle, was born last month.

She said: ''I reached out to him when he had the baby, which is so awesome. I saw photos of her. She's very cute...

''I realised the other day, he was a year younger than me when he and my mom started going out. It would be like me meeting someone who already had three teenage kids, kind of going into that situation was crazy.''

Rumer - whose father is 'Red' star, Bruce Willis - also opened up about how Ashton and Demi started dating, revealing that Demi asked him to join their ''crazy clan''.

She explained to Access Hollywood Live: ''They were just hanging out... my mom has always made how [my sisters and I] feel about situations the most important thing. I think it was more her going, 'Hey, this is my life and these are my kids and my priorities. So if you want to come and kind of join our crazy clan, this is what I already have kind of built,' which I find so amazing and respectful...

''It's one of the things that I admire most about my [parents], is that they set such an incredible example for kind of putting their children first and keeping a family together, no matter what.''