United Kingdom, June 15 -- Kevin Jonas couldn't raise his daughters without the support of his wife.

The 37-year-old star grew up with brothers, Joe, 35, and Nick, 32, and found fame with them as part of a pop trio in the late 2000s but admitted on Father's Day (15.06.25) that being father to girs Alena, 11, and eight-year-old Valentina with his wife Danielle is very much an "unknown territory" to him.

He told E! News: "It's really special, but it's also unknown territory for me, which is why I sometimes respond and react to situations like it would have been with boys. Then my wife looks at me like, 'No, the exact opposite of what you're doing, we need to do that!'

"I could not do it without her. She's the guiding light in our family....