Major part of human communication is spontaneous speech. Despite its automaticity, as a result of the complexity of the process of speech production, various disfluencies in speech occur, according with estimates ranging from 2 to 26 disfluencies per 100 words (Fox Tree, 1995). Besides silent pause, non-phonemic sound pause, false start correction and repetition, fillers are counted as disfluencies as well. Recent researches of fillers refute claims that they are unaesthetic, redundant and unnecessary additions to speech and necessary characteristic of low style. In this research, the use of exclusively lexicalized fillers within the spontaneous media speech of conversational style was analyzed. This research covered both formal and informal shows, broadcasted on Croatian Radiotelevision, while corpus is consisted of one-minute speech samples of a total of 40 speakers: 20 male and 20 female. Words that weren't semantically connected to the rest of utterance were considered as fillers, and they were analyzed accordingly to the frequency of their occurrence, type of word, gender differences, place in speech utterance, degree of formality and their function.