Maisie Williams and Sophie Turner
Cast members Maisie Williams and Sophie Turner arrive for the season four premiere of the HBO series ''Game of Thrones'' in New York March 18, 2014. Reuters/Lucas Jackson

One of the main reasons why avid readers of the "Game of Thrones" series continue to follow the TV show is because the writers on the set tend to change certain situations on the book to make it more interesting for video. Some are only minor changes while others completely transform the outcome, which makes the show all the more exciting to watch.

Here are some of the differences fans have noted between the book and TV series.

1. Ages of the characters

In the books, the story starts 14 years after Robert Baratheon's Rebellion. In the TV series, the story begins 17 years after the uprising. Therefore, the Stark children are older in the TV series compared to the books, writes Buzzsugar.com. Robb and Jon Snow are 17 years old on the show while they are 14 in the books. Sansa is 13 instead of 11 while Arya is 11 instead of nine. Joffrey Lannister is 16 instead of 12 while Daenerys Targaryen is 16 instead of 13 years old.

2. Joffrey's behavior

Although George R.R. Martin himself commended the actor's portrayal as a brat king, Joffrey was actually more receptive to his mother Cersei in the books. Joffrey is rather obedient to his mother and does not disrespect her in the terrible ways he does in the TV series.

3. Daenerys' lovers

Khal Drogo and Daario Naharis were depicted far different on TV than how they were described in the books. Khal Drogo is described as having long mustachios with several rings in them and several bells in his long braid. On the show, although he has long hair and a beard, he only has one ring and no bells. Daario was described in the books as having a blue beard and dressing attractively. On the show, he has a plain beard and wears earth-tone hues.

4. The fight of the Red Viper and the Mountain

Oberyn is less of a show-off in the books. When Gregor was pinned to the ground and Oberyn contemplates how to finish him off, Oberyn does not try to implicate Tywin Lannister by asking who gave the orders to murder his family. In the books, Gregor kills Oberyn by punching him repeatedly, as noted by MTV.com. On the TV show, Gregor crushes Oberyn's skull to a pulp.

5. The return of Catelyn Stark

In the books, Catelyn Stark was murdered at the Red Wedding. The author wrote that she would return as Lady Stoneheart, an entity changed by death that only seeks to deliver retribution to those who wronged her family. However, the actress revealed in an interview with Entertainment Weekly that she will not be coming back in the show's fifth season and that there will be no Lady Stoneheart in the series.

This list goes on and more twists and shockers are likely to be added as "Game of Thrones" Season 5 unfolds. Is there any notable change that should have been included here? Tell us in the comments.