The world is becoming smaller and families are naturally becoming more diverse and global. It is not uncommon for estate planners to encounter U.S. clients with international connections, such as ownership interests in foreign assets, beneficial interests in foreign trusts, non-citizen spouses, or children living in foreign countries. In addition, foreign clients may seek advice regarding their exposure to U.S. gift and estate taxes when making gifts or investments in the U.S. This article is intended to provide domestic estate planners with an understanding of the general framework of estate and gift taxes in an international context and to help identify potential cross-border issues and planning opportunities.