gapless relative

[navi]

1) This is a list of famous actors who died and you didn't even know about it.
2) This is a list of famous actors who died and you had no idea.

Are the above sentences grammatical?
Are they idiomatic?

I got the idea after reading this headline:

https://tinyurl.com/y3koacwj

or:

https://mortgageafterlife.com/trending/ ... =yahoo.com

Gratefully,
Navi

[Alan]

Yes, both are grammatical and idiomatic but not necessarily written in the most elegant or formal style!