Who played Veronica Mars in 'Veronica Mars'?

In which TV series is Bree Van de Kamp a main character? Who played Gabrielle Solis in 'Desperate Housewives'? Who played Lynette Scavo in 'Desperate Housewives'? In which TV series is Lynette Scavo a main character? Who played Vincent Chase in 'Entourage'? In which TV series is Vincent Chase a main character? Who played Ari Gold in 'Entourage'? In which TV series is Ari Gold a main character?