Frederick Dalziel Vreeland (born June 24, 1927) is an American career diplomat and writer whose final appointment was as United States Ambassador to Morocco.

In the Summer of 1963 he served temporarily as a member of the National Security Agency in Washington, DC., in order to brief President John F. Kennedy in preparation for the latter's visit to Berlin in June 1963.

At Kennedy's request, during one of the last of these briefings, he invented the phrase "Ich bin ein Berliner" and carefully taught the president how to pronounce those German words.

[3] While in Rome, Vreeland had the peculiar experience of being asked to be part of a team of acting & public-speaking coaches assembled to prepare the very inexperienced Sofia Coppola for a difficult scene in her father Francis's The Godfather: Part III.

[4] In 2005, while living in retirement in Rome, Vreeland urged senators not to confirm John Bolton as US ambassador to the United Nations, saying he had no diplomatic bone in his body and was unworthy of their trust.