Which flag will North and South Korea march under at the Olympic games?

Question

I read through a BBC article which stated that Kim Jong Un's sister is likely to attend the opening ceremony of this years Olympic games in Pyeongchang. The was one thing that got me confused though:

Both Koreas will march under one flag at the opening ceremony.

Knowing about the relationship between both countries, it seems pretty much unacceptable for both sides to march under the flag of the respective other.

Was it already publicly announced which flag this is going to be, and, if yes, how does it look like?

Answer 1

There is not much more to say than refer to you this wiki page about the Korean Unification Flag, which also happens to be the first page you would find when googling "flag korea olympic games".

The flag represents the Korean peninsula in blue on a white background. You can see it held by athletes from both Koreas in Turin 2006 Winter Olympics games on a photo in this article that confirms it will be used in 2018 as well.

Edit: As pointed in a comment by Shantanu Hebbar, the version of the Korean Unification Flag that will be used is the one without a dot for the contested Dokdo Islands (aka Takeshima, aka Liancourt) after a protest by Japanese Prime Minister Shinzo Abe. According to Wikipedia (without a source for this claim), Ulleungdo Island will not figure either, so it should be this version of the flag.