Game of Thrones is approaching the end of Season 3, with a Season 4 on the way, which has us wondering: how long will it last? According to GoT producer Frank Vogler, the show could last seven seasons: "I would hope that, if we all survive, and if the audience stays with us, we'll probably get through to seven seasons.”

The A Song of Ice and Fire books series currently consists of five novels, with two more planned. The first two seasons of GoT were based on the first two novels, respectively, while season three covers events in the first half of the third book. Season four plans to tackle the second half of book three, leaving only three seasons of the show to cover the story of the final four books (assuming the last two books are finished in time).

If this is true, we have to assume that future seasons of GoT will leave out more details of the books than the first three seasons have. We would love it if the show could last 15 or so seasons to squeeze in every little nuance the books have to offer, but we shouldn’t get greedy. Four more seasons of TV’s most epic show is definitely something to get excited over!

We can’t help but wonder if the show will have to recast some of the children’s parts if it lasts too long, though. Isaac Hempstead-Wright, who plays ten-year-old Bran Stark, has already aged noticeably since the show began. If the show continues running every year, season seven will air in 2017, when Isaac will turn 18. Seven Hells, that’s almost a man grown!

How many seasons do you think Game of Thrones should have? Sound off in the comments below.

Get more Game of Thrones spoilers here.

Catch the next episode of Game of Thrones on Sunday, May 19 at 9 p.m. ET/PT on HBO.