Smart cities rely on digital technologies that might be questionably acceptable among the population due to their newness. Millennials as a generation that was born into the setting featuring smart technologies seem to be an appropriate focus group for understanding the attitudes towards these technologies. Given that autonomous vehicles (AV) are the future mobility service in smart cities, an important question regarding their adoption arises. Previous research has shown that technological enthusiasm is an important factor for adopting new technologies. The purpose of this paper is therefore to examine the attitude of millennials towards semi- and fully AV. AV trust, AV concerns, AV benefits, AV safety and AV data sharing have been shown to be additional factors that are important in addressing AV adoption. Besides, statistically significant differences between the groups, namely technologically more enthusiastic and technologically less enthusiastic, were identified and further analysed.