Who played Villanelle in 'Killing Eve'?

In which TV series is Logan Roy a main character? Who played Kendall Roy in 'Succession'? Who played Shiv Roy in 'Succession'? Who played Roman Roy in 'Succession'? In which TV series is Villanelle a main character? Who played Eve Polastri in 'Killing Eve'? In which TV series is Eve Polastri a main character? Who played Barry Berkman in 'Barry'?