This thesis is entitled "A Study of Expressive Speech Act Used by The Characters in movie Marriage Story By Noah Baumbach. This research aims to find the types of expressive speech acts by the characters in the film "Marriage Story" script. This research uses qualitative methods, and data will be analyzed descriptively. Several utterances contain expressive types from Searle (1976) from these data. Based on Searle's theory, there are 6 types of expressive speech acts, namely: expressive thanking, expressive apologies, expressive congratulations, expressive greetings, expressive wishes, expressive attitudes. There are 69 expressive utterances follow speech that has been found in the film "Marriage Story". The research results show that the types of expressive speech acts obtained are as follows: Thank-you expressions made up 25 (36.2%), apologizing expressions 14 (20.2%), congratulations expressions 5 (7.2%), greeting expressions 12 (17.3%), wishes expressions 3 (4.3%), and attitude expressions 10 (14.4%). The results of this study indicate that the expressive the most dominant used by the characters in this Film is the expressive of Thanking as many as 25 (36.2%). This means that the characters declare/use expressions of thanking because he wants to show expressions of appreciation for something.