Besides being shows about vampires and romance, The Vampire Diaries and True Blood featured a lot of actors who appeared in both series. Spanning over eight seasons and two spinoffs called The Originals and Legacies, The Vampire Diaries followed the denizens of Mystic Falls and the eternal struggles between vampires and various other magical folks. Because the show was known for its romance and visual appeal, it utilized a host of young stars whose work on the series landed them roles elsewhere. Even the smallest role in The Vampire Diaries was a mark of success for an up-and-coming actor.

https://screenrant.com/the-vampire-diaries-actors-roles-true-blood-characters/