There are three Venom movies total: Venom, Venom: Let There Be Carnage, and Venom: The Last Dance. Technically speaking, Venom got his first on-screen movie appearance in Spider-Man 3 in 2007. However ...
If you're eagerly awaiting the fourth instalment of the 'xXx' movie series, why not catch up on the first three films in the meantime? They're all available to stream on various OTT platforms.