The K-2 non-immigrant visa allows child(ren) of your Fiancee to enter into the U.S. and adjust status after you and your Fiancee are
married. Children who are unmarried and under the age of 21 are eligible for K-2 visas. A separate Form I-129F is not required for K-2 children, but
children must be listed on the parent’s Form I-129F. If you and your Fiancee do not marry within 90 days, K-2 children must depart the U.S. together
with your Fiancee.Your Fiancee’schild(ren) may apply for a K-2 visa at the same time as your Fiancee(accompanying) or may apply within one year
of when your Fiancee’s K-1 visa was issued (following-to-join).
Depending on the embassy and whether the children are accompanying or following-to-join, K-2 children may or may not be required to attend the interview. Some embassies require all K-2 children to attend the interview, regardless of age. In other countries, children under the age of 14 are not required to attend the interview. Children who do not apply for K-2 visas at the same time as their parents, but apply within one year must attend their own interview.
At the time a K-2 child enters the U.S., the child must be under the age of 21 in order to apply for adjustment of status. K-2 children
must file their own adjustment of status applications. K-2 children who enter the U.S. before they turn 21 and then later turn 21 before filing for adjustment
of status or turn 21 while their adjustment of status application is pending are still eligible to receive their green cards. K-2 children remain eligible
to apply for the K-2 visas and adjust status even after their parents have obtained their green cards based on the K-1 adjustment of status application.