Beatrice Fihn is a Swedish lawyer who works in international law, diplomacy, and global security. She currently serves as the Director of Lex International.

Fihn accepted the 2017 Nobel Peace Prize on behalf of the International Campaign to Abolish Nuclear Weapons (ICAN). She was previously the Executive Director of ICAN. She is also the founder of Lex International Fund, a philanthropic organization dedicated to supporting international law.