FAQ / Do I have to file separate I-129F Petitions for each of them, so they can receive K-2 visas and come to US with fiance (fiancee)?

I want my fiance (fiancee) to come to the United States to marry me. I know that I have to file I-129F, Petition for Alien Fiance (e), so my fiance (fiancee) can get a K-1 Fiance (e) visa. But my fiance (fiancee) has children. Do I have to file separate I-129F Petitions for each of them, so they can receive K-2 visas and come to US with fiance (fiancee)?
No. There is no separate petition or separate fee for the children of the fiance (fiancee) - they are listed in the same petition. Children are given what is known as “derivative status” when their parent is granted a K-1 visa. This means that the parent’s visa status is given also to his or her children, if the children are unmarried and under 21 years of age.
The children of your fiance (fiancee) should be listed in your I-129F, Petition for Alien Fiance (e), even if they will not be traveling at this time, they may follow your alien fiance (fiancee) within one year from the date of issuance of the K-1 visa.